They have a toll-free number for activation problems and the people there will surely be able to tell you.
http://www.mikeshardware.com/reports/report_winactprob.html is just a story.
http://www.microsoft.com/worldwide/ will certainly help you to find a phone number (it might not be the above toll-free number, but it should be a good start).
Hope this helps.
I have two copies of XP Home. These are legitmate copies - opened retail boxes. I want to determine if they have been installed without actually installing them. If they have not been installed, I want to sell them. If they have been installed, I will toss them because they cannot be used again. I've tried going to the Microsoft site, but have not found what I need to know. Any ideas?