diff --git a/include/boost/process/v2/detail/process_handle_windows.hpp b/include/boost/process/v2/detail/process_handle_windows.hpp
index 20330e98..36dbf9d4 100644
--- a/include/boost/process/v2/detail/process_handle_windows.hpp
+++ b/include/boost/process/v2/detail/process_handle_windows.hpp
@@ -318,8 +318,6 @@ struct basic_process_handle_win
     }
 };
 
-extern template struct basic_process_handle_win<>;
-
 }
 
 BOOST_PROCESS_V2_END_NAMESPACE
diff --git a/src/detail/process_handle_windows.cpp b/src/detail/process_handle_windows.cpp
index afe821cd..6fc77e5f 100644
--- a/src/detail/process_handle_windows.cpp
+++ b/src/detail/process_handle_windows.cpp
@@ -158,7 +158,6 @@ void resume_(HANDLE handle, error_code & ec)
 }
 #endif
 
-template struct basic_process_handle_win<>;
 
 }
 
diff --git a/src/ext/exe.cpp b/src/ext/exe.cpp
index 0f05f8ab..3476937a 100644
--- a/src/ext/exe.cpp
+++ b/src/ext/exe.cpp
@@ -75,6 +75,7 @@ filesystem::path exe(HANDLE process_handle)
 
 filesystem::path exe(HANDLE proc, boost::system::error_code & ec)
 {
+#if _WIN32_WINNT >= 0x0600
     wchar_t buffer[MAX_PATH];
     // On input, specifies the size of the lpExeName buffer, in characters.
     DWORD size = MAX_PATH;
@@ -84,7 +85,9 @@ filesystem::path exe(HANDLE proc, boost::system::error_code & ec)
     }
     else
         BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec);
-
+#else
+    BOOST_PROCESS_V2_ASSIGN_EC(ec, net::error::operation_not_supported);
+#endif
     return "";
 }