diff --git a/ext/libexecstream/win/exec-stream-impl.cpp b/ext/libexecstream/win/exec-stream-impl.cpp
index 42b8805c0..0add2045d 100644
--- a/ext/libexecstream/win/exec-stream-impl.cpp
+++ b/ext/libexecstream/win/exec-stream-impl.cpp
@@ -166,9 +166,11 @@ void exec_stream_t::start( std::string const & program, std::string const & argu
     STARTUPINFO si;
     ZeroMemory( &si, sizeof( si ) );
     si.cb=sizeof( si );
+    si.wShowWindow = SW_HIDE;
+    si.dwFlags = STARTF_USESHOWWINDOW;
     PROCESS_INFORMATION pi;
     ZeroMemory( &pi, sizeof( pi ) );
-    if( !CreateProcess( 0, const_cast< char * >( command.c_str() ), 0, 0, TRUE, 0, 0, 0, &si, &pi ) ) {
+    if( !CreateProcess( 0, const_cast< char * >( command.c_str() ), 0, 0, TRUE, DETACHED_PROCESS, 0, 0, &si, &pi ) ) {
         throw os_error_t( "exec_stream_t::start: CreateProcess failed.\n command line was: "+command );
     }