OvenMaster said:You do not have to pay over $100. I paid $85 for an OEM copy of SP1. SP2 can be had even cheaper, in the $75-80 range.
Tom
Besides an OEM buy for a good price these days if you have exceeded the amount of times you have reactivated Windows within a certain period or feel that your copy is not genuine MS you can go to the activation page and read the instructions for purchasing a license for your current copy of Windows. That will cost less then buying an installation disk.