I had a different type of problem. When the scan started, I started encountering UAC notices from windows and a good portion of my VSTs were missing. The notices prevented the VST scanner program from completing. Sometimes it would just hang.
I eventually had to shut off my "User Access Control" and run a manual scan to get everything back - I just don't know how long that will be good for. Never encountered this before the upgrade (UAC interference). . .
Steve