Recently i bought Toshiba p500-191 laptop with Windows 7 64bit Home Premium. I have created a system backup the first day. Now my Windows have crashed and i tired system restore, but Windows crash after couple hours. (no matter windows update is on or off). I have original CD key on back of my laptop and i want to make a fresh clean install. Where can i find untouched Windows 7 64bit Home Premium to download?