Microsoft-watch.com reported that the product activation process for Windows XP is going to be changing. People who buy their computers from a major PC vendors, will be required to have vendor activate the Windows for them. These users will no longer be able to activating their copies of XP over the Web.
The main problem with this change arises, when you have to reinstall XP from the recover disks you got from your OEM. You'll be required to call Microsoft and answer a series of questions designed to prove you have a legitimate copy before you can activate it.