diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3e7378a7e..f9e21604f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -159,16 +159,16 @@ endif()
 option(STATIC "Link libraries statically" ${DEFAULT_STATIC})
 
 if(MINGW)
-  get_filename_component(msys2_install_path "[HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\MSYS2 ${ARCH_WIDTH}bit;InstallLocation]" ABSOLUTE)
+  string(REGEX MATCH "^[^/]:/[^/]*" msys2_install_path "${CMAKE_C_COMPILER}")
+  message(STATUS "MSYS location: ${msys2_install_path}")
   set(CMAKE_INCLUDE_PATH "${msys2_install_path}/mingw${ARCH_WIDTH}/include")
   # This is necessary because otherwise CMake will make Boost libraries -lfoo
   # rather than a full path. Unfortunately, this makes the shared libraries get
   # linked due to a bug in CMake which misses putting -static flags around the
   # -lfoo arguments.
-  list(REMOVE_ITEM CMAKE_C_IMPLICIT_LINK_DIRECTORIES
-    "${msys2_install_path}/mingw${ARCH_WIDTH}/lib")
-  list(REMOVE_ITEM CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES
-    "${msys2_install_path}/mingw${ARCH_WIDTH}/lib")
+  set(DEFLIB ${msys2_install_path}/mingw${ARCH_WIDTH}/lib)
+  list(REMOVE_ITEM CMAKE_C_IMPLICIT_LINK_DIRECTORIES ${DEFLIB})
+  list(REMOVE_ITEM CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES ${DEFLIB})
 endif()
 
 if(STATIC)
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index ea107abb6..ffd4e7869 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -2009,11 +2009,14 @@ bool Blockchain::check_tx_inputs(const transaction& tx, uint64_t* pmax_used_bloc
     boost::thread_group threadpool;
 
     std::auto_ptr < boost::asio::io_service::work > work(new boost::asio::io_service::work(ioservice));
-    for (int i = 0; i < threads; i++)
-    {
-        threadpool.create_thread(boost::bind(&boost::asio::io_service::run, &ioservice));
-    }
-
+	if(threads > 1)
+	{
+	    for (int i = 0; i < threads; i++)
+	    {
+	        threadpool.create_thread(boost::bind(&boost::asio::io_service::run, &ioservice));
+	    }
+	}
+	
 #define KILL_IOSERVICE()  \
         if(threads > 1) \
         { \