Originally Posted by DJ-CHRIS
I have NEVER registered XP and have never had problems.
Activation is not mandatory if your using a corporate copy as well.
Very interesting. I've always gone through the registration process. So, I was just going on an educated guess that Windows would have a "nag" window pop up once in a while.
Yes, corporate copies of Windows don't need to be activated. In the computer lab at my college, we installed XP on about 20 machines with the same registration key.