This one guy in my training class at work told me that once you buy a full version (retail) of Windows XP you can put it on as many computers as you want, just not at the same time. So you can put it on one computer, then if you buy/build a new computer, you can put it on that one just as long as the other one doesnt have it. The reason it came up is because I bought a full version of XP Home and an OEM version of Media Center for the computer I built back in August. Some of you might remember the troubles I had since I posted a few times here about it. For those that dont and want to know why I bought both, since MC can only be purchased as OEM it doesnt come with instructions so I had trouble installing it and since I couldnt return it I just gave up and went and bought the full version of XP. After about a week of using that I found out how to properly install MC, so I formatted and put MC on here. So now I have a copy of XP Home that isnt installed on any computer, so I figured it was a waste of money, but according to him, I could install it on a new computer even though it was already activated on mine, so is this true?