Locked out of windows
Today I turned on my computer to get to the main Windows XP Classic Log in screen. I hit ok to log in and all of a sudden a dialog box pops up and says "windows need to be activated to log in" so I hit okay and it brings up another dialog box the "Windows Activation Screen" and it says "your windows is already activated, click ok to exit" I hit okay and it brings me right back to the log in screen. I hit ok to log in and then it brings me back to the dialog box saying I need to activate my windows. Anybody know Why, or what I can Do?