I want to upgrade my computer a Gateway Official Site: Shop - Desktops – LX6200-01 Product Details - LX 6200 01 Product Details processor to a Newegg.com - AMD Phenom II X4 940 Deneb 3.0GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM2+ 125W Quad-Core Black Edition Processor - Processors - Desktops and it has a combo so might as well get a new mobo. To this Newegg.com - Computer Parts, PC Components, Laptop Computers, Digital Cameras and more! . But if I upgrade my mobo and processor do I have to reinstall my Windows Vista 64 bit? Because it didn't come with a backup disc. How can I backup my OS? Do I have to buy a new vista?