2 days ago I received a message on logon " Due to significant hardware changes you need to re-activate XP home". The last h/w change I did was a new graphics card approx 3 years ago !! As I have nothing to hide I click on "Activate Now" the "Product activation" box opens but then hangs eventually going "Not responding". I've checked various forums and they mention using "Start,Programs,Accessories,System Tools" and run the "Actvation wizard" but it does not exist. I spoke with a Microsoft person on the activation line but she said the only option was to re-install XP. However she could not tell me why I had been told to reactivate even though no h/w changes have been made in the last 3 years. My copy is legal and I run auto updates having been through the Windows Genuine validation process. Any suggestion guys or will I have to do a complete re-install of XP ?