I'm trying to fix my friend's 3~ year old laptop. I've been able to install windows 7 successfully, but then the next day, it uninstalls itself. I've never seen this before. It makes me think it's a hardware problem. Potentially a HDD issue? It has an AMD CPU so it does get rather hot in there after long HD video sessions. It got up to 85c after watching a 3 minute music video in HD. So I'm starting to think the heat has started to damage some of the components. Any ideas or advice would be helpful!