My niece is having trouble with her computer. She lives too far away from me for me to physically check it. However, she found that her AVG anti virus program had stoped updating. When I got her to run an anti virus check, AVG just kept running, but didn't finish. Microsoft Disc Cleanup and Defragmenter also fail to finish. All have to be stopped eventually. She is unable to pin point when the problems started. I did manage to get her to run Adaware, which, after a few problems, did run and finish OK. I tried getting her to run a quick Anti Virus scan from an on-line checker, but it also wouldn't finish. So I am left with trial and error testing, I just wondered if I should be looking for a virus, trojan, or just a XP SP2 problem.