Just a warning. I've used this reg cleaner successfully on XP but have had to bin it with Windows 7. (Not checked Vista yet). Trying to run Event Viewer or Task Scheduler on W7 brought up the error- "MMC could not create the snap-in". (Microsoft Management Console). Only version 3.5 of .Net installed so didn't think it was a dot Net problem. Searched for a while but all pointed to .Net. So I decides to go back to basics and restored the registry from Regscrub and now Event Viewer and T. S. work ok. Uninstalled RegscrubVistaXP and will just stick to Ccleaner's mild one with backups.