diff --git a/contrib/epee/include/console_handler.h b/contrib/epee/include/console_handler.h
index d76d7930c..95b986ff5 100644
--- a/contrib/epee/include/console_handler.h
+++ b/contrib/epee/include/console_handler.h
@@ -65,7 +65,7 @@ namespace epee
       if (state_eos == m_read_status)
         return false;
 
-      std::unique_lock<std::mutex> lock(m_response_mutex);
+      boost::unique_lock<boost::mutex> lock(m_response_mutex);
       while (state_init == m_read_status)
       {
         m_response_cv.wait(lock);
@@ -104,7 +104,7 @@ namespace epee
   private:
     bool start_read()
     {
-      std::unique_lock<std::mutex> lock(m_request_mutex);
+      boost::unique_lock<boost::mutex> lock(m_request_mutex);
       if (!m_run.load(std::memory_order_relaxed) || m_has_read_request)
         return false;
 
@@ -115,7 +115,7 @@ namespace epee
 
     bool wait_read()
     {
-      std::unique_lock<std::mutex> lock(m_request_mutex);
+      boost::unique_lock<boost::mutex> lock(m_request_mutex);
       while (m_run.load(std::memory_order_relaxed) && !m_has_read_request)
       {
         m_request_cv.wait(lock);
@@ -188,7 +188,7 @@ namespace epee
         }
         else
         {
-          std::unique_lock<std::mutex> lock(m_response_mutex);
+          boost::unique_lock<boost::mutex> lock(m_response_mutex);
           if (m_run.load(std::memory_order_relaxed))
           {
             m_line = std::move(line);
@@ -220,10 +220,10 @@ namespace epee
     bool m_has_read_request;
     t_state m_read_status;
 
-    std::mutex m_request_mutex;
-    std::mutex m_response_mutex;
-    std::condition_variable m_request_cv;
-    std::condition_variable m_response_cv;
+    boost::mutex m_request_mutex;
+    boost::mutex m_response_mutex;
+    boost::condition_variable m_request_cv;
+    boost::condition_variable m_response_cv;
   };
 
 
diff --git a/contrib/epee/include/net/abstract_tcp_server2.h b/contrib/epee/include/net/abstract_tcp_server2.h
index f3dd7291c..80f3f6db0 100644
--- a/contrib/epee/include/net/abstract_tcp_server2.h
+++ b/contrib/epee/include/net/abstract_tcp_server2.h
@@ -153,8 +153,8 @@ namespace net_utils
     // for calculate speed (last 60 sec)
     network_throttle m_throttle_speed_in;
     network_throttle m_throttle_speed_out;
-    std::mutex m_throttle_speed_in_mutex;
-    std::mutex m_throttle_speed_out_mutex;
+    boost::mutex m_throttle_speed_in_mutex;
+    boost::mutex m_throttle_speed_out_mutex;
 
 	public:
 			void setRpcStation();
@@ -307,7 +307,7 @@ namespace net_utils
     /// The next connection to be accepted
     connection_ptr new_connection_;
 
-    std::mutex connections_mutex;
+    boost::mutex connections_mutex;
     std::deque<std::pair<boost::system_time, connection_ptr>> connections_;
 
   }; // class <>boosted_tcp_server
diff --git a/contrib/epee/include/net/abstract_tcp_server2.inl b/contrib/epee/include/net/abstract_tcp_server2.inl
index 4fb6fa75d..698e1947a 100644
--- a/contrib/epee/include/net/abstract_tcp_server2.inl
+++ b/contrib/epee/include/net/abstract_tcp_server2.inl
@@ -41,7 +41,7 @@
 #include <boost/utility/value_init.hpp>
 #include <boost/asio/deadline_timer.hpp>
 #include <boost/date_time/posix_time/posix_time.hpp> // TODO
-#include <boost/thread/thread.hpp> // TODO
+#include <boost/thread/v2/thread.hpp> // TODO
 #include "misc_language.h"
 #include "pragma_comp_defs.h"
 
@@ -294,7 +294,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
 				if (delay > 0) {
 					long int ms = (long int)(delay * 100);
 					epee::net_utils::data_logger::get_instance().add_data("sleep_down", ms);
-					std::this_thread::sleep_for(std::chrono::milliseconds(ms));
+					boost::this_thread::sleep_for(boost::chrono::milliseconds(ms));
 				}
 			} while(delay > 0);
 		} // any form of sleeping
diff --git a/contrib/epee/include/syncobj.h b/contrib/epee/include/syncobj.h
index 0833b4114..8912fc018 100644
--- a/contrib/epee/include/syncobj.h
+++ b/contrib/epee/include/syncobj.h
@@ -30,11 +30,11 @@
 #ifndef __WINH_OBJ_H__
 #define __WINH_OBJ_H__
 
+#include <boost/chrono/duration.hpp>
 #include <boost/thread/locks.hpp>
 #include <boost/thread/mutex.hpp>
 #include <boost/thread/recursive_mutex.hpp>
-#include <thread>
-#include <chrono>
+#include <boost/thread/v2/thread.hpp>
 
 namespace epee
 {
@@ -224,10 +224,10 @@ namespace epee
 #define  SHARED_CRITICAL_REGION_BEGIN(x) { shared_guard   critical_region_var(x)
 #define  EXCLUSIVE_CRITICAL_REGION_BEGIN(x) { exclusive_guard   critical_region_var(x)
 
-#define  CRITICAL_REGION_LOCAL(x) {std::this_thread::sleep_for(std::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));}   epee::critical_region_t<decltype(x)>   critical_region_var(x)
-#define  CRITICAL_REGION_BEGIN(x) { std::this_thread::sleep_for(std::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep())); epee::critical_region_t<decltype(x)>   critical_region_var(x)
-#define  CRITICAL_REGION_LOCAL1(x) {std::this_thread::sleep_for(std::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));} epee::critical_region_t<decltype(x)>   critical_region_var1(x)
-#define  CRITICAL_REGION_BEGIN1(x) {  std::this_thread::sleep_for(std::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep())); epee::critical_region_t<decltype(x)>   critical_region_var1(x)
+#define  CRITICAL_REGION_LOCAL(x) {boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));}   epee::critical_region_t<decltype(x)>   critical_region_var(x)
+#define  CRITICAL_REGION_BEGIN(x) { boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep())); epee::critical_region_t<decltype(x)>   critical_region_var(x)
+#define  CRITICAL_REGION_LOCAL1(x) {boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep()));} epee::critical_region_t<decltype(x)>   critical_region_var1(x)
+#define  CRITICAL_REGION_BEGIN1(x) {  boost::this_thread::sleep_for(boost::chrono::milliseconds(epee::debug::g_test_dbg_lock_sleep())); epee::critical_region_t<decltype(x)>   critical_region_var1(x)
 
 #define  CRITICAL_REGION_END() }
 
diff --git a/contrib/otshell_utils/lib_common1.hpp b/contrib/otshell_utils/lib_common1.hpp
index 456e63fbb..2cb466beb 100644
--- a/contrib/otshell_utils/lib_common1.hpp
+++ b/contrib/otshell_utils/lib_common1.hpp
@@ -19,9 +19,11 @@
 
 #include <functional>
 #include <memory>
-#include <thread>
 #include <atomic>
-#include <mutex>
+#include <boost/thread.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/recursive_mutex.hpp>
+#include <boost/thread/lock_guard.hpp>
 
 
 // list of thigs from libraries that we pull into namespace nOT::nNewcli
@@ -45,8 +47,7 @@
 	using std::shared_ptr; \
 	using std::weak_ptr; \
 	using std::enable_shared_from_this; \
-	using std::mutex; \
-	using std::lock_guard; \
+	using boost::lock_guard; \
 
 #endif
 
diff --git a/contrib/otshell_utils/utils.cpp b/contrib/otshell_utils/utils.cpp
index e1d7d9a14..53cb44dca 100644
--- a/contrib/otshell_utils/utils.cpp
+++ b/contrib/otshell_utils/utils.cpp
@@ -12,6 +12,7 @@
 #include <fstream>
 #include <iostream>
 #include <iomanip>
+#include <chrono>
 
 #include "utils.hpp"
 
@@ -128,7 +129,7 @@ std::string get_current_time() {
 
 cNullstream g_nullstream; // extern a stream that does nothing (eats/discards data)
 
-std::recursive_mutex gLoggerGuard; // extern
+boost::recursive_mutex gLoggerGuard; // extern
 std::atomic<int> gLoggerGuardDepth; // extern
 
 std::atomic<int> & gLoggerGuardDepth_Get() {
@@ -302,7 +303,7 @@ mPid2Number_Biggest(0)
 	mIsBroken=false; // ok, constr. succeeded, so string is not broken now
 
 	// this is here, because it could be using logging itself to log creation of first thread/PID etc
-	Thread2Number( std::this_thread::get_id() ); // convert current id to short number, useful to reserve a number so that main thread is usually called 1
+	Thread2Number( boost::this_thread::get_id() ); // convert current id to short number, useful to reserve a number so that main thread is usually called 1
 	Pid2Number( getpid() ); // add this proces ID as first one
 }
 
@@ -347,7 +348,7 @@ std::ostream & cLogger::write_stream(int level, const std::string & channel ) {
 			output << windows_stream(level);
 			#endif
 			output << icon(level) << ' ';
-			std::thread::id this_id = std::this_thread::get_id();
+			boost::thread::id this_id = boost::this_thread::get_id();
 			output << "{" << Thread2Number(this_id) << "}";
 			auto nicePid = Pid2Number(getpid());
 			if (nicePid>0) output << " {p" << nicePid << "}";
@@ -516,7 +517,7 @@ std::string cLogger::endline() const {
     #endif
 }
 
-int cLogger::Thread2Number(const std::thread::id id) {
+int cLogger::Thread2Number(const boost::thread::id id) {
 	auto found = mThread2Number.find( id );
 	if (found == mThread2Number.end()) { // new one
 		mThread2Number_Biggest++;
diff --git a/contrib/otshell_utils/utils.hpp b/contrib/otshell_utils/utils.hpp
index 297f13ac0..98508b565 100644
--- a/contrib/otshell_utils/utils.hpp
+++ b/contrib/otshell_utils/utils.hpp
@@ -29,7 +29,7 @@
 // #define opt_debug_debug
 
 #ifdef opt_debug_debug
-	#define _dbg_dbg(X) do { std::cerr<<"_dbg_dbg: " << OT_CODE_STAMP << " {thread=" << std::this_thread::get_id()<<"} " \
+	#define _dbg_dbg(X) do { std::cerr<<"_dbg_dbg: " << OT_CODE_STAMP << " {thread=" << boost::this_thread::get_id()<<"} " \
 	<< " {pid="<<getpid()<<"} " <<  ": " << X << std::endl; } while(0)
 #else
 	#define _dbg_dbg(X) do { } while(0)
@@ -79,7 +79,7 @@ extern cNullstream g_nullstream; // a stream that does nothing (eats/discards da
 
 // TODO make _dbg_ignore thread-safe everywhere
 
-extern std::recursive_mutex gLoggerGuard; // the mutex guarding logging/debugging code e.g. protecting streams, files, etc
+extern boost::recursive_mutex gLoggerGuard; // the mutex guarding logging/debugging code e.g. protecting streams, files, etc
 
 std::atomic<int> & gLoggerGuardDepth_Get(); // getter for the global singleton of counter (it guarantees initializing it to 0). This counter shows the current recursion (re-entrant) level of debug macros.
 
@@ -91,7 +91,7 @@ std::atomic<int> & gLoggerGuardDepth_Get(); // getter for the global singleton o
 	_dbg_dbg("WRITE DEBUG: LEVEL="<<LEVEL<<" VAR: " << VAR ); \
 	auto level=LEVEL; short int part=0; \
 	try { \
-		std::lock_guard<std::recursive_mutex> mutex_guard( nOT::nUtils::gLoggerGuard ); \
+		boost::lock_guard<boost::recursive_mutex> mutex_guard( nOT::nUtils::gLoggerGuard ); \
 		part=1; \
 		try { \
 			++nOT::nUtils::gLoggerGuardDepth_Get(); \
@@ -111,7 +111,7 @@ std::atomic<int> & gLoggerGuardDepth_Get(); // getter for the global singleton o
 	_dbg_dbg("WRITE DEBUG: LEVEL="<<LEVEL<<" CHANNEL="<<CHANNEL<<" VAR: " << VAR ); \
 	auto level=LEVEL; short int part=0; \
 	try { \
-		std::lock_guard<std::recursive_mutex> mutex_guard( nOT::nUtils::gLoggerGuard ); \
+		boost::lock_guard<boost::recursive_mutex> mutex_guard( nOT::nUtils::gLoggerGuard ); \
 		part=1; \
 		try { \
 			++nOT::nUtils::gLoggerGuardDepth_Get(); \
@@ -253,9 +253,9 @@ class cLogger {
 		void OpenNewChannel_(const std::string & channel);  ///< internal function, will throw in case of problems
 		std::string GetLogBaseDir() const;
 
-		std::map< std::thread::id , int > mThread2Number; ///<  change long thread IDs into a short nice number to show
+		std::map< boost::thread::id , int > mThread2Number; ///<  change long thread IDs into a short nice number to show
 		int mThread2Number_Biggest; ///<  current biggest value held there (biggest key) - works as growing-only counter basically
-		int Thread2Number(const std::thread::id id); ///<  convert the system's thread id into a nice short our id; make one if new thread
+		int Thread2Number(const boost::thread::id id); ///<  convert the system's thread id into a nice short our id; make one if new thread
 
 		std::map< t_anypid , int > mPid2Number; ///<  change long proces PID into a short nice number to show
 		int mPid2Number_Biggest; ///<  current biggest value held there (biggest key) - works as growing-only counter basically
diff --git a/src/blockchain_db/berkeleydb/db_bdb.cpp b/src/blockchain_db/berkeleydb/db_bdb.cpp
index bfdb22a10..1fef9e619 100644
--- a/src/blockchain_db/berkeleydb/db_bdb.cpp
+++ b/src/blockchain_db/berkeleydb/db_bdb.cpp
@@ -135,7 +135,7 @@ const unsigned int DB_BUFFER_LENGTH = 32 * MB;
 const unsigned int DB_DEF_CACHESIZE = 256 * MB;
 
 #if defined(BDB_BULK_CAN_THREAD)
-const unsigned int DB_BUFFER_COUNT = std::thread::hardware_concurrency();
+const unsigned int DB_BUFFER_COUNT = boost::thread::hardware_concurrency();
 #else
 const unsigned int DB_BUFFER_COUNT = 1;
 #endif
diff --git a/src/blockchain_db/berkeleydb/db_bdb.h b/src/blockchain_db/berkeleydb/db_bdb.h
index bf9665cae..d7cbd24e7 100644
--- a/src/blockchain_db/berkeleydb/db_bdb.h
+++ b/src/blockchain_db/berkeleydb/db_bdb.h
@@ -130,7 +130,7 @@ public:
 
     T acquire_buffer()
     {
-        std::unique_lock<std::mutex> lock(m_lock);
+        boost::unique_lock<boost::mutex> lock(m_lock);
         m_cv.wait(lock, [&]{ return m_count > 0; });
 
         --m_count;
@@ -154,7 +154,7 @@ public:
 
     void release_buffer(T buffer)
     {
-        std::unique_lock<std::mutex> lock(m_lock);
+        boost::unique_lock<boost::mutex> lock(m_lock);
 
         assert(buffer != nullptr);
         auto it = m_buffer_map.find(buffer);
@@ -196,10 +196,10 @@ private:
     std::vector<T> m_buffers;
     std::unordered_map<T, size_t> m_buffer_map;
 
-    std::condition_variable m_cv;
+    boost::condition_variable m_cv;
     std::vector<bool> m_open_slot;
     size_t m_count;
-    std::mutex m_lock;
+    boost::mutex m_lock;
 
     size_t m_buffer_count;
 };
diff --git a/src/common/util.h b/src/common/util.h
index de0244c7f..7554b1df7 100644
--- a/src/common/util.h
+++ b/src/common/util.h
@@ -150,8 +150,8 @@ namespace tools
     /*! \brief calles m_handler */
     static void handle_signal(int type)
     {
-      static std::mutex m_mutex;
-      std::unique_lock<std::mutex> lock(m_mutex);
+      static boost::mutex m_mutex;
+      boost::unique_lock<boost::mutex> lock(m_mutex);
       m_handler(type);
     }
 
diff --git a/src/crypto/crypto.cpp b/src/crypto/crypto.cpp
index fa7b1b580..e47aab0f7 100644
--- a/src/crypto/crypto.cpp
+++ b/src/crypto/crypto.cpp
@@ -34,7 +34,8 @@
 #include <cstdlib>
 #include <cstring>
 #include <memory>
-#include <mutex>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/lock_guard.hpp>
 
 #include "common/varint.h"
 #include "warnings.h"
@@ -52,8 +53,6 @@ namespace crypto {
   using std::abort;
   using std::int32_t;
   using std::int64_t;
-  using std::lock_guard;
-  using std::mutex;
   using std::size_t;
   using std::uint32_t;
   using std::uint64_t;
@@ -63,7 +62,7 @@ namespace crypto {
 #include "random.h"
   }
 
-  mutex random_lock;
+  boost::mutex random_lock;
 
   static inline unsigned char *operator &(ec_point &point) {
     return &reinterpret_cast<unsigned char &>(point);
@@ -100,7 +99,7 @@ namespace crypto {
    * 
    */
   secret_key crypto_ops::generate_keys(public_key &pub, secret_key &sec, const secret_key& recovery_key, bool recover) {
-    lock_guard<mutex> lock(random_lock);
+    boost::lock_guard<boost::mutex> lock(random_lock);
     ge_p3 point;
 
     secret_key rng;
@@ -199,7 +198,7 @@ namespace crypto {
   };
 
   void crypto_ops::generate_signature(const hash &prefix_hash, const public_key &pub, const secret_key &sec, signature &sig) {
-    lock_guard<mutex> lock(random_lock);
+    boost::lock_guard<boost::mutex> lock(random_lock);
     ge_p3 tmp3;
     ec_scalar k;
     s_comm buf;
@@ -280,7 +279,7 @@ POP_WARNINGS
     const public_key *const *pubs, size_t pubs_count,
     const secret_key &sec, size_t sec_index,
     signature *sig) {
-    lock_guard<mutex> lock(random_lock);
+    boost::lock_guard<boost::mutex> lock(random_lock);
     size_t i;
     ge_p3 image_unp;
     ge_dsmp image_pre;
diff --git a/src/crypto/crypto.h b/src/crypto/crypto.h
index 360b571f3..883aa521a 100644
--- a/src/crypto/crypto.h
+++ b/src/crypto/crypto.h
@@ -31,7 +31,8 @@
 #pragma once
 
 #include <cstddef>
-#include <mutex>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/lock_guard.hpp>
 #include <vector>
 
 #include "common/pod-class.h"
@@ -44,7 +45,7 @@ namespace crypto {
 #include "random.h"
   }
 
-  extern std::mutex random_lock;
+  extern boost::mutex random_lock;
 
 #pragma pack(push, 1)
   POD_CLASS ec_point {
@@ -121,7 +122,7 @@ namespace crypto {
   template<typename T>
   typename std::enable_if<std::is_pod<T>::value, T>::type rand() {
     typename std::remove_cv<T>::type res;
-    std::lock_guard<std::mutex> lock(random_lock);
+    boost::lock_guard<boost::mutex> lock(random_lock);
     generate_random_bytes(sizeof(T), &res);
     return res;
   }
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 2aa8ecec4..f540697dc 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -2105,7 +2105,7 @@ bool Blockchain::check_tx_inputs(const transaction& tx, uint64_t* pmax_used_bloc
   std::vector < uint64_t > results;
   results.resize(tx.vin.size(), 0);
 
-  int threads = std::thread::hardware_concurrency();
+  int threads = boost::thread::hardware_concurrency();
 
   boost::asio::io_service ioservice;
   boost::thread_group threadpool;
@@ -2965,7 +2965,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
     return true;
 
   bool blocks_exist = false;
-  uint64_t threads = std::thread::hardware_concurrency();
+  uint64_t threads = boost::thread::hardware_concurrency();
 
   if (blocks_entry.size() > 1 && threads > 1 && m_max_prepare_blocks_threads > 1)
   {
@@ -3165,7 +3165,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
   // [output] stores all transactions for each tx_out_index::hash found
   std::vector<std::unordered_map<crypto::hash, cryptonote::transaction>> transactions(amounts.size());
 
-  threads = std::thread::hardware_concurrency();
+  threads = boost::thread::hardware_concurrency();
   if (!m_db->can_thread_bulk_indices())
     threads = 1;
 
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.h b/src/cryptonote_protocol/cryptonote_protocol_handler.h
index c2d428025..1c92958c9 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.h
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.h
@@ -134,7 +134,7 @@ namespace cryptonote
     bool m_one_request = true;
 
 		// static std::ofstream m_logreq;
-    std::mutex m_buffer_mutex;
+    boost::mutex m_buffer_mutex;
     double get_avg_block_size();
     boost::circular_buffer<size_t> m_avg_buffer = boost::circular_buffer<size_t>(10);
 
diff --git a/src/daemonizer/windows_service.cpp b/src/daemonizer/windows_service.cpp
index 88f05a305..f8cc0c6c7 100644
--- a/src/daemonizer/windows_service.cpp
+++ b/src/daemonizer/windows_service.cpp
@@ -99,8 +99,8 @@ namespace {
   // to allow the user to read any output.
   void pause_to_display_admin_window_messages()
   {
-    std::chrono::milliseconds how_long{1500};
-    std::this_thread::sleep_for(how_long);
+    boost::chrono::milliseconds how_long{1500};
+    boost::this_thread::sleep_for(how_long);
   }
 }
 
diff --git a/src/daemonizer/windows_service_runner.h b/src/daemonizer/windows_service_runner.h
index 2d21509ec..f4258a215 100644
--- a/src/daemonizer/windows_service_runner.h
+++ b/src/daemonizer/windows_service_runner.h
@@ -56,7 +56,7 @@ namespace windows {
   private:
     SERVICE_STATUS_HANDLE m_status_handle{nullptr};
     SERVICE_STATUS m_status{};
-    std::mutex m_lock{};
+    boost::mutex m_lock{};
     std::string m_name;
     T_handler m_handler;
 
diff --git a/src/p2p/data_logger.cpp b/src/p2p/data_logger.cpp
index 7fc85e3bc..ca0726c5f 100644
--- a/src/p2p/data_logger.cpp
+++ b/src/p2p/data_logger.cpp
@@ -40,7 +40,7 @@ namespace epee
 namespace net_utils
 {
 	data_logger &data_logger::get_instance() {
-		std::call_once(m_singleton, 
+		boost::call_once(m_singleton, 
 			[] { 
 				_info_c("dbg/data","Creating singleton of data_logger");
 				if (m_state != data_logger_state::state_before_init) { _erro_c("dbg/data","Internal error in singleton"); throw std::runtime_error("data_logger singleton"); }
@@ -61,7 +61,7 @@ namespace net_utils
 	data_logger::data_logger() {
 		_note_c("dbg/data","Starting data logger (for graphs data)");
 		if (m_state != data_logger_state::state_during_init) { _erro_c("dbg/data","Singleton ctor state"); throw std::runtime_error("data_logger ctor state"); }
-		std::lock_guard<std::mutex> lock(mMutex); // lock
+		boost::lock_guard<boost::mutex> lock(mMutex); // lock
 		
 		// prepare all the files for given data channels:
 		mFilesMap["peers"] = data_logger::fileData("log/dr-monero/peers.data");
@@ -89,11 +89,11 @@ namespace net_utils
 		std::shared_ptr<boost::thread> logger_thread(new boost::thread([&]() {
 			_info_c("dbg/data","Inside thread for data logger");
 			while (m_state == data_logger_state::state_during_init) { // wait for creation to be done (in other thread, in singleton) before actually running
-				std::this_thread::sleep_for(std::chrono::seconds(1));
+				boost::this_thread::sleep_for(boost::chrono::seconds(1));
 			}
 			_info_c("dbg/data","Inside thread for data logger - going into main loop");
 			while (m_state == data_logger_state::state_ready_to_use) { // run as long as we are not closing the single object
-				std::this_thread::sleep_for(std::chrono::seconds(1));
+				boost::this_thread::sleep_for(boost::chrono::seconds(1));
 				saveToFile(); // save all the pending data
 			}
 			_info_c("dbg/data","Inside thread for data logger - done the main loop");
@@ -106,12 +106,12 @@ namespace net_utils
 	data_logger::~data_logger() {
 		_note_c("dbg/data","Destructor of the data logger");
 		{
-			std::lock_guard<std::mutex> lock(mMutex);
+			boost::lock_guard<boost::mutex> lock(mMutex);
 			m_state = data_logger_state::state_dying;
 		}
 		_info_c("dbg/data","State was set to dying");
 		while(m_thread_maybe_running) { // wait for the thread to exit
-			std::this_thread::sleep_for(std::chrono::seconds(1));
+			boost::this_thread::sleep_for(boost::chrono::seconds(1));
 			_info_c("dbg/data","Waiting for background thread to exit");
 		}
 		_info_c("dbg/data","Thread exited");
@@ -123,7 +123,7 @@ namespace net_utils
 	}
 	
 	void data_logger::add_data(std::string filename, unsigned int data) {
-		std::lock_guard<std::mutex> lock(mMutex);
+		boost::lock_guard<boost::mutex> lock(mMutex);
 		if (m_state != data_logger_state::state_ready_to_use) { _info_c("dbg/data","Data logger is not ready, returning."); return; }
 
 		if (mFilesMap.find(filename) == mFilesMap.end()) { // no such file/counter
@@ -151,7 +151,7 @@ namespace net_utils
 
 	void data_logger::saveToFile() {
 		_dbg2_c("dbg/data","saving to files");
-		std::lock_guard<std::mutex> lock(mMutex);
+		boost::lock_guard<boost::mutex> lock(mMutex);
 		if (m_state != data_logger_state::state_ready_to_use) { _info_c("dbg/data","Data logger is not ready, returning."); return; }
 		nOT::nUtils::cFilesystemUtils::CreateDirTree("log/dr-monero/net/");
 		for (auto &element : mFilesMap)
@@ -194,7 +194,7 @@ namespace net_utils
 data_logger_state data_logger::m_state(data_logger_state::state_before_init); ///< (static) state of the singleton object
 std::atomic<bool> data_logger::m_save_graph(false); // (static)
 std::atomic<bool> data_logger::m_thread_maybe_running(false); // (static)
-std::once_flag data_logger::m_singleton; // (static)
+boost::once_flag data_logger::m_singleton; // (static)
 std::unique_ptr<data_logger> data_logger::m_obj; // (static)
 
 } // namespace
diff --git a/src/p2p/data_logger.hpp b/src/p2p/data_logger.hpp
index affc97f5f..148afc0ab 100644
--- a/src/p2p/data_logger.hpp
+++ b/src/p2p/data_logger.hpp
@@ -33,8 +33,9 @@
 #include <map>
 #include <fstream>
 #include <memory>
-#include <thread>
-#include <mutex>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/once.hpp>
 #include <atomic>
 
 namespace epee
@@ -71,7 +72,7 @@ enum class data_logger_state { state_before_init, state_during_init, state_ready
 			static bool is_dying();
 
 		private:
-			static std::once_flag m_singleton; ///< to guarantee singleton creates the object exactly once
+			static boost::once_flag m_singleton; ///< to guarantee singleton creates the object exactly once
 			static data_logger_state m_state; ///< state of the singleton object
 			static std::atomic<bool> m_thread_maybe_running; ///< is the background thread (more or less) running, or is it fully finished
 			static std::unique_ptr<data_logger> m_obj; ///< the singleton object. Only use it via get_instance(). Can be killed by kill_instance()
@@ -94,7 +95,7 @@ enum class data_logger_state { state_before_init, state_during_init, state_ready
 			};
 			
 			std::map<std::string, fileData> mFilesMap;
-			std::mutex mMutex;
+			boost::mutex mMutex;
 			void saveToFile(); ///< write data to the target files. do not use this directly
 	};
 	
diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index 56717ec66..6278db891 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -585,7 +585,7 @@ namespace nodetool
           break;
         epee::net_utils::data_logger::get_instance().add_data("peers", number_of_peers);
 
-        std::this_thread::sleep_for(std::chrono::seconds(1));
+        boost::this_thread::sleep_for(boost::chrono::seconds(1));
       } // main loop of thread
       _note("Thread monitor number of peers - done");
     })); // lambda
diff --git a/src/p2p/network_throttle-detail.cpp b/src/p2p/network_throttle-detail.cpp
index 54c82dd8d..ed3c8e7b4 100644
--- a/src/p2p/network_throttle-detail.cpp
+++ b/src/p2p/network_throttle-detail.cpp
@@ -243,7 +243,7 @@ network_time_seconds network_throttle::get_sleep_time_after_tick(size_t packet_s
 void network_throttle::logger_handle_net(const std::string &filename, double time, size_t size) {
 	if (! epee::net_utils::data_logger::m_save_graph)
 		return;
-    std::mutex mutex;
+    boost::mutex mutex;
     mutex.lock(); {
         std::fstream file;
         file.open(filename.c_str(), std::ios::app | std::ios::out );
diff --git a/src/p2p/network_throttle.cpp b/src/p2p/network_throttle.cpp
index 42f54964b..30538bb3c 100644
--- a/src/p2p/network_throttle.cpp
+++ b/src/p2p/network_throttle.cpp
@@ -67,9 +67,9 @@ namespace net_utils
 
 // ================================================================================================
 // static:
-std::mutex network_throttle_manager::m_lock_get_global_throttle_in;
-std::mutex network_throttle_manager::m_lock_get_global_throttle_inreq;
-std::mutex network_throttle_manager::m_lock_get_global_throttle_out;
+boost::mutex network_throttle_manager::m_lock_get_global_throttle_in;
+boost::mutex network_throttle_manager::m_lock_get_global_throttle_inreq;
+boost::mutex network_throttle_manager::m_lock_get_global_throttle_out;
 
 int network_throttle_manager::xxx;
 
@@ -77,27 +77,27 @@ int network_throttle_manager::xxx;
 // ================================================================================================
 // methods:
 i_network_throttle & network_throttle_manager::get_global_throttle_in() { 
-	std::call_once(m_once_get_global_throttle_in, [] { m_obj_get_global_throttle_in.reset(new network_throttle("in/all","<<< global-IN",10)); }	);
+	boost::call_once(m_once_get_global_throttle_in, [] { m_obj_get_global_throttle_in.reset(new network_throttle("in/all","<<< global-IN",10)); }	);
 	return * m_obj_get_global_throttle_in;
 }
-std::once_flag network_throttle_manager::m_once_get_global_throttle_in;
+boost::once_flag network_throttle_manager::m_once_get_global_throttle_in;
 std::unique_ptr<i_network_throttle> network_throttle_manager::m_obj_get_global_throttle_in;
 
 
 
 i_network_throttle & network_throttle_manager::get_global_throttle_inreq() { 
-	std::call_once(m_once_get_global_throttle_inreq, [] { m_obj_get_global_throttle_inreq.reset(new network_throttle("inreq/all", "<== global-IN-REQ",10)); }	);
+	boost::call_once(m_once_get_global_throttle_inreq, [] { m_obj_get_global_throttle_inreq.reset(new network_throttle("inreq/all", "<== global-IN-REQ",10)); }	);
 	return * m_obj_get_global_throttle_inreq;
 }
-std::once_flag network_throttle_manager::m_once_get_global_throttle_inreq;
+boost::once_flag network_throttle_manager::m_once_get_global_throttle_inreq;
 std::unique_ptr<i_network_throttle> network_throttle_manager::m_obj_get_global_throttle_inreq;
 
 
 i_network_throttle & network_throttle_manager::get_global_throttle_out() { 
-	std::call_once(m_once_get_global_throttle_out, [] { m_obj_get_global_throttle_out.reset(new network_throttle("out/all", ">>> global-OUT",10)); }	);
+	boost::call_once(m_once_get_global_throttle_out, [] { m_obj_get_global_throttle_out.reset(new network_throttle("out/all", ">>> global-OUT",10)); }	);
 	return * m_obj_get_global_throttle_out;
 }
-std::once_flag network_throttle_manager::m_once_get_global_throttle_out;
+boost::once_flag network_throttle_manager::m_once_get_global_throttle_out;
 std::unique_ptr<i_network_throttle> network_throttle_manager::m_obj_get_global_throttle_out;
 
 
diff --git a/src/p2p/network_throttle.hpp b/src/p2p/network_throttle.hpp
index 6135ed72b..b954c5b3a 100644
--- a/src/p2p/network_throttle.hpp
+++ b/src/p2p/network_throttle.hpp
@@ -113,16 +113,16 @@ class network_throttle_manager {
 	//protected:
 	public: // XXX
 		// [[note1]]
-		static std::once_flag m_once_get_global_throttle_in; 
-		static std::once_flag m_once_get_global_throttle_inreq; // [[note2]]
-		static std::once_flag m_once_get_global_throttle_out;
+		static boost::once_flag m_once_get_global_throttle_in;
+		static boost::once_flag m_once_get_global_throttle_inreq; // [[note2]]
+		static boost::once_flag m_once_get_global_throttle_out;
 		static std::unique_ptr<i_network_throttle> m_obj_get_global_throttle_in;
 		static std::unique_ptr<i_network_throttle> m_obj_get_global_throttle_inreq;
 		static std::unique_ptr<i_network_throttle> m_obj_get_global_throttle_out;
 
-    static std::mutex m_lock_get_global_throttle_in;
-    static std::mutex m_lock_get_global_throttle_inreq;
-    static std::mutex m_lock_get_global_throttle_out;
+    static boost::mutex m_lock_get_global_throttle_in;
+    static boost::mutex m_lock_get_global_throttle_inreq;
+    static boost::mutex m_lock_get_global_throttle_out;
 
 		friend class cryptonote::cryptonote_protocol_handler_base; // FRIEND - to directly access global throttle-s. !! REMEMBER TO USE LOCKS!
 		friend class connection_basic; // FRIEND - to directly access global throttle-s. !! REMEMBER TO USE LOCKS!
diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index 65508b9d5..3e5cdfcb6 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -445,7 +445,7 @@ bool simple_wallet::set_auto_refresh(const std::vector<std::string> &args/* = st
   if (auto_refresh && !m_auto_refresh_run.load(std::memory_order_relaxed))
   {
     m_auto_refresh_run.store(true, std::memory_order_relaxed);
-    m_auto_refresh_thread = std::thread([&]{wallet_refresh_thread();});
+    m_auto_refresh_thread = boost::thread([&]{wallet_refresh_thread();});
   }
   else if (!auto_refresh && m_auto_refresh_run.load(std::memory_order_relaxed))
   {
@@ -1256,7 +1256,7 @@ bool simple_wallet::close_wallet()
     m_auto_refresh_run.store(false, std::memory_order_relaxed);
     m_wallet->stop();
     {
-      std::unique_lock<std::mutex> lock(m_auto_refresh_mutex);
+      boost::unique_lock<boost::mutex> lock(m_auto_refresh_mutex);
       m_auto_refresh_cond.notify_one();
     }
     m_auto_refresh_thread.join();
@@ -1341,7 +1341,7 @@ bool simple_wallet::start_mining(const std::vector<std::string>& args)
   req.miner_address = m_wallet->get_account().get_public_address_str(m_wallet->testnet());
 
   bool ok = true;
-  size_t max_mining_threads_count = (std::max)(std::thread::hardware_concurrency(), static_cast<unsigned>(2));
+  size_t max_mining_threads_count = (std::max)(boost::thread::hardware_concurrency(), static_cast<unsigned>(2));
   if (0 == args.size())
   {
     req.threads_count = 1;
@@ -1458,7 +1458,7 @@ bool simple_wallet::refresh_main(uint64_t start_height, bool reset)
   m_auto_refresh_run.store(false, std::memory_order_relaxed);
   // stop any background refresh, and take over
   m_wallet->stop();
-  std::unique_lock<std::mutex> lock(m_auto_refresh_mutex);
+  boost::unique_lock<boost::mutex> lock(m_auto_refresh_mutex);
   m_auto_refresh_cond.notify_one();
 
   if (reset)
@@ -2434,7 +2434,7 @@ void simple_wallet::wallet_refresh_thread()
 {
   while (true)
   {
-    std::unique_lock<std::mutex> lock(m_auto_refresh_mutex);
+    boost::unique_lock<boost::mutex> lock(m_auto_refresh_mutex);
     if (!m_auto_refresh_run.load(std::memory_order_relaxed))
       break;
     m_auto_refresh_refreshing = true;
@@ -2447,7 +2447,7 @@ void simple_wallet::wallet_refresh_thread()
     m_auto_refresh_refreshing = false;
     if (!m_auto_refresh_run.load(std::memory_order_relaxed))
       break;
-    m_auto_refresh_cond.wait_for(lock, chrono::seconds(90));
+    m_auto_refresh_cond.wait_for(lock, boost::chrono::seconds(90));
   }
 }
 //----------------------------------------------------------------------------------------------------
@@ -2457,7 +2457,7 @@ bool simple_wallet::run()
   m_auto_refresh_run = m_wallet->auto_refresh();
   if (m_auto_refresh_run)
   {
-    m_auto_refresh_thread = std::thread([&]{wallet_refresh_thread();});
+    m_auto_refresh_thread = boost::thread([&]{wallet_refresh_thread();});
   }
   else
   {
diff --git a/src/simplewallet/simplewallet.h b/src/simplewallet/simplewallet.h
index 5dac60447..d1617dbf4 100644
--- a/src/simplewallet/simplewallet.h
+++ b/src/simplewallet/simplewallet.h
@@ -242,9 +242,9 @@ namespace cryptonote
 
     std::atomic<bool> m_auto_refresh_run;
     bool m_auto_refresh_refreshing;
-    std::thread m_auto_refresh_thread;
-    std::mutex m_auto_refresh_mutex;
-    std::condition_variable m_auto_refresh_cond;
+    boost::thread m_auto_refresh_thread;
+    boost::mutex m_auto_refresh_mutex;
+    boost::condition_variable m_auto_refresh_cond;
     std::atomic<bool> m_in_manual_refresh;
   };
 }
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index a86f2ffdf..389286ceb 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -204,7 +204,7 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, uint64_
 
     tx_pub_key = pub_key_field.pub_key;
     bool r = true;
-    int threads = std::thread::hardware_concurrency();
+    int threads = boost::thread::hardware_concurrency();
     if (miner_tx && m_refresh_type == RefreshNoCoinbase)
     {
       // assume coinbase isn't for us
@@ -574,7 +574,7 @@ void wallet2::process_blocks(uint64_t start_height, const std::list<cryptonote::
   size_t current_index = start_height;
   blocks_added = 0;
 
-  int threads = std::thread::hardware_concurrency();
+  int threads = boost::thread::hardware_concurrency();
   if (threads > 1)
   {
     std::vector<crypto::hash> round_block_hashes(threads);
@@ -771,7 +771,7 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
   size_t try_count = 0;
   crypto::hash last_tx_hash_id = m_transfers.size() ? get_transaction_hash(m_transfers.back().m_tx) : null_hash;
   std::list<crypto::hash> short_chain_history;
-  std::thread pull_thread;
+  boost::thread pull_thread;
   uint64_t blocks_start_height;
   std::list<cryptonote::block_complete_entry> blocks;
 
@@ -788,7 +788,7 @@ void wallet2::refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& re
       uint64_t next_blocks_start_height;
       std::list<cryptonote::block_complete_entry> next_blocks;
       bool error = false;
-      pull_thread = std::thread([&]{pull_next_blocks(start_height, next_blocks_start_height, short_chain_history, blocks, next_blocks, error);});
+      pull_thread = boost::thread([&]{pull_next_blocks(start_height, next_blocks_start_height, short_chain_history, blocks, next_blocks, error);});
 
       process_blocks(blocks_start_height, blocks, added_blocks);
       blocks_fetched += added_blocks;
@@ -1312,7 +1312,7 @@ bool wallet2::prepare_file_names(const std::string& file_path)
 //----------------------------------------------------------------------------------------------------
 bool wallet2::check_connection()
 {
-  std::lock_guard<std::mutex> lock(m_daemon_rpc_mutex);
+  boost::lock_guard<boost::mutex> lock(m_daemon_rpc_mutex);
 
   if(m_http_client.is_connected())
     return true;
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index ceeef492e..c79da2e15 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -407,7 +407,7 @@ namespace tools
 
     std::atomic<bool> m_run;
 
-    std::mutex m_daemon_rpc_mutex;
+    boost::mutex m_daemon_rpc_mutex;
 
     i_wallet2_callback* m_callback;
     bool m_testnet;
diff --git a/src/wallet/wallet_errors.h b/src/wallet/wallet_errors.h
index 10d27651f..80482c1ba 100644
--- a/src/wallet/wallet_errors.h
+++ b/src/wallet/wallet_errors.h
@@ -31,6 +31,7 @@
 #pragma once
 
 #include <stdexcept>
+#include <system_error>
 #include <string>
 #include <vector>