What JBI said. Also, if you're having problems with your media, Microsoft does make the media for all versions of Windows Vista and 7 freely downloadable via DigitalRiver links. If you've got a good serial, that's all the rest you'd need. If it's an OEM machine, that came with Windows 7 preinstalled, you may have a restore partition you can make use of, as well.
Behemoth - media server
Galactica - test lab server
Falling Outside the Normal Moral Constraints - MBP 15
Donnager - M4800 DTR
Rocinante - E5530 testing machine
Saratoga, Ticonderoga, BunkerHill - the Hydra desktop PC-thing.