Hi, I was using a Genuine Microsoft Windows earlier in December when my pc got hit wit a virus and i reinstalled the Windows but after that the Security Alert is showing that my pc is at risk, when i checked i saw that the Automatic Update is turned off and whn i tried to on it; it was not working hence i clicked to windows updates and when i tried to download something it shows validation process as i had Genuine Windows i tried to validate it and now the it is showing that the it is invalid key........ please help me to change my Windows profile to valid and genuine Windows..........