When I try to activate my windows and put in the correct product key, which is the Microsoft XP Professional OEM product sticker on the side of my computer, it would say it incorrect product key. I have retyped it +10 times. I called the activation number and they said the installation ID was not working and was unable to validate my windows. I was transfered to tech support and told me to change 1 number in OBETimer in the register, but no go. I was also given two different product keys to type in at the activation windows and it still wouldn't activate. I have ran out of ideas on what else it could be.