Hey guys. Ok, well it was my assumption that Microsoft could let you activate a Windows XP product key as many times as needed on a single machine. Now, I reformat my computer about once everu 3-4 months to keep up performance. Recently when I reformated the computer, installation went fine as expected, but when it came time to activate windows, I got a message stating "the number of times I can activate this product key have been exceeded.... please use a different product key." What the heck?!?!?!?! Anybody have a similar problem.......?