ok so ive had an hp 8150p for a year now, running windows xp. last week it died. screen just went blue and then it shut off and when i turned it on i couldnt get into windows anymore. so my friend has a cd for vista, which i used to install vista on my computer. worked great for a day. now its dead again. what is going on? how can i fix it? 10/10 K for help