I had two HP pavilion laptops. One with vista and one with windows 7. The windows 7 one broke so I put that hard drive in the vista one (a long time ago). Something happened now and it won't start and says I need to restore but when it gets to the windows software installation, the screen flickers black sometime and the progress bar gets stuck in the middle. Then it said the restore was inconplete and i have to do the whole thing over again im thinking it has something to do with the switched hard drives and i don't have its original one anymore... What in the world do I do