Grampa-

When I used Systemworks on my old computer (Widows 98), it seemed like the only thing that kept 98 from crashing. It seems to be the opposite for me on XP. When it happened the first time, I thought it was just a virus, but it happened five times to me in a matter of two months. The only thing I kept the same on my machine when I formatted it was systemworks 2005(unfortunately paid $89 for it too). I kept up to date religiously, and used it almost daily too(ie. virus scans, windows scans, cleanup, speed disk...) Ever since I decided not to use it on my last format, smooth sailing all the time. Besides Windows XP has many of the same functions systemworks has. As far as just the stand alone antivirus is concerned, I have no opinion about it except.... If it was viruses causing all of my problems, then it sucks.

Scottiboi-

The only verification error message that I can think of is a proper windows key. I know someone else who got the same thing when they had a kid build them a computer. Used the same CD to install windows on multiple computers. Not a good thing. If you have done everything else that people have suggested on this thread, I don't know what else to tell you other than-

Get a new computer from a respectable source or run the older version that worked.