I have a laptop that is a few years old. About a week ago it was dropped and since I have been having problems with it. I'm almost positive it is the heard drive causing them. The computer will turn on but freezes at the starting windows screen. Sometimes it says can not find bootable device. The hard drive is also making a grinding noise. The laptop is a Toshiba Satellite. It recognizes that there is a hard drive when I go to F2 but it won't read it I don't think. I have gone into F12 and attempted the <HDD RECOVERY> but at 25% it always experiences an error. I am prepared to buy a new hard drive as it only costs about $50 but will I have to buy a new Windows 7? It didn't come with a CD, it was pre-installed However there is a sticker on the bottom with a Product Code and other codes. Would it be possible to transfer it over or re-download it?