If anyone DOES ever hose a box completely, anyone with Microsoft's TechNet access can get a Windows 7 DVD installer - which you can easily put onto a Flash drive. (That's my preferred method) - I found a little utility to remove each disk from booting for only a certain version of Windows 7 too, so it prompts for which 'Edition' to install. Have 32 and 64-bit ISO's for both, you'll need a product key to go with it. (You get 30 days to put it in if you don't have it immediately) Then you'll just need to dig out drivers for whatever Windows doesn't detect.