Hi, I recently built a top of the line comp, and I borrowed XP Home from a friend, but it did not have a product key on it. So it got it mostly installed except i couldent get past the part where i needed to type in the Product key because the Xp Home my friend gave me did not come with a key. So i went to best buy and bought a new xp, so I start up the compy and it goes straight to the "type in your product key" screen. So i type it in, and wouldent you know it does not take the key. I think it wont take it because it is already half way installed with the other disc, so it is expecting the key for the other disc. Is there anyway that I can erase the intallation process of the other CD so I can start fresh with the new one? Plz help, I dont want my $1600 that I spent on this comp go to waste!