here's what happens my friends pc will boot like normal when you click on the user name the pc acts like it's loading then all of a sudden just totally reboots this is the thrid time now it's done this, a friend of her husbands seemed to fix the problem, it came back again and I reformatted the pc it worked again for a few months and now it's saying you have to re-load windows. My friend tried to re-install windows but it didn't work I don't know if she did it right or it just didn't work. I'm starting to think it might be a hardware problem. She has Avg anti-virus and she scans everyday it hasn't picked up any viruses. Since I don't know myself what's wrong with it I thought I would ask for some help.