I recently bought (not pirated) my own copy of Windows XP. I updated my old windows 98 to XP. The problem is, when I try to activate it with the product key that came with the package, it says "incorrect product key". I tried it again and again and made sure I had it right. I can't believe a legitimate computer store would sell a product key that didn't work. A friend brought over his product key, but it gave the same message. Did it get corrupted somehow? I checked my date and time and they are correct. Any suggestions?