Index: dll/win32/shell32/folders/CFSFolder.cpp
===================================================================
--- dll/win32/shell32/folders/CFSFolder.cpp	(revision 73854)
+++ dll/win32/shell32/folders/CFSFolder.cpp	(working copy)
@@ -1066,6 +1066,8 @@
         hr = CLSIDFromString(wszName, &clsid);
         if (hr == S_OK)
             pwszClsid = wszName;
+        else
+            return E_FAIL
 
         if (m_bGroupPolicyActive)
         {