How to remove WGA Notifications in Windows
If you updated your windows, chances are that you’ll have the Windows Genuine Advantage Notifications Tool installed. The WGA notification tool connects to MS servers every time you boot to check the legitimacy of your copy of windows.
Download this tool here or check out MyDigitalLife, which has a post on various ways to remove the WGA Notification in Windows.
You could also try out Fergus’ blog for a quick way.