I don't claim any fame when it comes to computers- I'm a moron, okay. But learn from my mistakes. I have an HP Media Center, the one you can play movies on, get digital TV, etc, and it's only a year old. Well, I had somebody hack the thing and they did a good job. They deleted all of the exe and dll files and installed Windows Pro files. It won't boot up and the factory discs don't work as they are for Media Center and not Windows Pro. So I bought a copy (used Windows Pro) for $75.00 and went to install it and everything was great until it said I had to register it. Needless to say I can't register it because Microsoft won't give me the numbers to register because it is a used disc. After questioning the guy at Microsoft, any time you buy their environments, it is a one time install only. If your computer dies and you have to do a reinstall of the Windows- go buy a new disc as Microsoft will not let you reinstall the programing you paid good money to get. I went out and bought a new Gateway CPU and have a worthless POS sitting here on the floor, that is, until I find some other environment to run on it. I will NEVER have Microcrap on any of my computers again. Any computer nuts out there that would like to suggest a good environment- I'm listening.