You may well be correct, however there is a major problem: I have NEVER been able to Restore to an earlier version in Windows 7. I did so several times with XP over 4 years, but W7 just won't let me. I've disabled the firewall, disabled virus control, I don't know if it's something to do with ZoneAlarm, but as I say I've disabled it; but it makes no difference. Once again, after many attempts W7 WILL NOT RESTORE. So we need a cleverer fix than you or anyone else has so far mentioned.