I was using a counterfeit Windows XP & Microsoft Office 2007 from past 6 months and I was unaware of this, Thaaaaaaaaaaaaaaaankuuuuuuuuuuuuuu very much to WGA website which let me know that my windows copy was illegal, i went back to the PC seller & demanded for the Valid volume license & now i have a genuine windows & office copy, i am very happy & thankful to microsoft, my suggestion is to let more and more people know about WGA so that nobody gets counterfeited.
Thanks
Saiyed