The last twice I used CC using the settings below, I found afterwards that I could not update Virus programs and other utility programs. But I could connect with IE. I had to use system restore to get it back. It must have deleted a necessary file but I don't know what.
Windows Cleaner: Temp internet files/cookies/delete Index.dat files
Temp files/Clipboard/memory dumps/chkdsk file fragments/win log files/old prefetch data
Reg Integrity: missing/shared dll's/unused file extensions/obsolete software/mui cache
Any one else had this?