I have a Toshiba Satellite A105-S4384. I had to wipe the hard drive clean and re-install xp mce 2005. However, when I enter the valid product key found on the bottom of the laptop, I get the "incorrect product key" error message. I've checked and re-checked the product key and it is the correct product key. I'm just trying to install an oem copy of xp media center edition 2005. Can't find much on microsoft's site about this problem. any suggestions?