Update: Before you try all of this, you may want to try using WinToFlash, a utility designed to create a bootable Windows flash drive for Windows XP/Vista/7/Server. If this works for you, you can skip ...
There's one immutable law of PCs: sh*t happens. And when it does, there's usually a way to fix things, if you had the foresight to create one essential recovery tool first. Booting from a USB recovery ...