diff --git a/addons/gdcef/gdcef/SConstruct b/addons/gdcef/gdcef/SConstruct
index 9442832..e81bb63 100644
--- a/addons/gdcef/gdcef/SConstruct
+++ b/addons/gdcef/gdcef/SConstruct
@@ -133,8 +133,8 @@ elif platform == 'windows':
     env.Append(CCFLAGS=['-W3', '-GR'])
     env.Append(CXXFLAGS='/std:c++17')
     if compile_mode == 'debug':
-        env.Append(CPPDEFINES=['_DEBUG'])
-        env.Append(CCFLAGS=['-EHsc', '-MDd', '-ZI'])
+        env.Append(CPPDEFINES=['_DEBUG', '_ITERATOR_DEBUG_LEVEL=0'])
+        env.Append(CCFLAGS=['-EHsc', '-MDd', '-ZI', '-FS'])
         env.Append(LINKFLAGS=['-DEBUG'])
     else:
         env.Append(CPPDEFINES=['NDEBUG'])
@@ -166,9 +166,13 @@ if platform == 'linux' or platform == 'osx':
 
 # OpenMP
 if env['cpu_parallelism']:
-    env.Append(CCFLAGS=['-fopenmp'])
-    env.Append(CXXFLAGS=['-fopenmp'])
-    env.Append(LINKFLAGS=['-fopenmp'])
+    if platform == 'windows':
+        env.Append(CCFLAGS=['-openmp'])
+        env.Append(CXXFLAGS=['-openmp'])
+    else:
+        env.Append(CCFLAGS=['-fopenmp'])
+        env.Append(CXXFLAGS=['-fopenmp'])
+        env.Append(LINKFLAGS=['-fopenmp'])
 
 # User defines
 env.Append(CXXFLAGS=['-DCEF_ARTIFACTS_FOLDER=' + env['cef_artifacts_folder']])
diff --git a/addons/gdcef/gdcef/src/gdcef.cpp b/addons/gdcef/gdcef/src/gdcef.cpp
index 573baff..40c7402 100644
--- a/addons/gdcef/gdcef/src/gdcef.cpp
+++ b/addons/gdcef/gdcef/src/gdcef.cpp
@@ -534,7 +534,7 @@ void GDCef::Impl::OnBeforeClose(CefRefPtr<CefBrowser> browser)
 void GDCef::Impl::OnBeforeCommandLineProcessing(const CefString& ProcessType,
                CefRefPtr<CefCommandLine> command_line)
 {
-    CEF_REQUIRE_UI_THREAD();
+    //CEF_REQUIRE_UI_THREAD();
     GDCEF_DEBUG();
 
     if (command_line == nullptr)
diff --git a/addons/gdcef/subprocess/SConstruct b/addons/gdcef/subprocess/SConstruct
index cc3a5e2..d42af36 100644
--- a/addons/gdcef/subprocess/SConstruct
+++ b/addons/gdcef/subprocess/SConstruct
@@ -139,7 +139,7 @@ elif platform == 'windows':
     env.Append(CCFLAGS=['-W3', '-GR'])
     env.Append(CXXFLAGS='/std:c++17')
     if compile_mode == 'debug':
-        env.Append(CPPDEFINES=['_DEBUG'])
+        env.Append(CPPDEFINES=['_DEBUG', '_ITERATOR_DEBUG_LEVEL=0'])
         env.Append(CCFLAGS=['-EHsc', '-MDd', '-ZI'])
         env.Append(LINKFLAGS=['-DEBUG'])
     else: