I ran both NAV and Mcafee, and some other virus scan I found on a tech support page, and other than stopping a bunch of infected with Klez messages, NAV caught the JS.Startpage virus, and all that's supposed to affect is IE and the home page. I removed everything I don't ever run, and run a minimal amount of stuff in startup. The thing I don't get is what triggers it, sometimes it takes a long time, but other times it's about 20 minutes after a reboot. It is unafected by how long the PC has been on, rebooting always fixes it for a while. Ive had a USB and two PS2 mice on it, and it does the same thing, so it probably isn't hardware. Nothin unusual seems to be loaded up when it freezes. It used to almost never crash, and only had to have a frozen task ended, and even that didn't happen very often. Anyway, thanks for the reply..