My computer has recently been having some issues. When I start up my computer it seems fine, but after about 3 minutes of my computer starting up completely, it freezes up. If I restart it, it'll sometimes be fine the second time around but now I can't get it to continue running at all. It'll always freeze up. I'm going to try safe-mode and get a virus sweep going but I'm not sure how much success I will have. Please Help Me.