So my friends 3~ year old Toshiba Satellite laptop is having some issues. It uses a Phenom CPU. I can't even get into windows. I can get into the BIOS usually but sometimes it freezes. I'm trying to fix it but I'm not really sure what the problem is. He re-installed windows 7 a while back and it was working alright until the other day. My first thought is that the CPUs thermal paste might need replacing, since AMD CPUs tend to run much hotter than intel's and the Laptop is 3-4 years old. Does anybody have any ideas on what could be happening? I'm not a PC idiot, but software has never been my expertise. Any help would be appreciated.