Originally Posted by Sage

Ok, to dissent with above:

Moving the hard drive is a BAD idea, unless your two computers are exactly identical. Everything in your computer is going to be different than his computer, so everything that Windows installs to make the drive work will be right on your computer and wrong for his. Plus, there's no reason that he wouldn't be able to install Windows on his own computer, so it doesn't make any sense to take it out and put it in a new computer. FYI.