Remove windows Genuine Notification?

Official Method by Microsoft 

1. Lauch Windows Task Manager.
2. End wgatray.exe process in Task Manager.
3. Restart Windows XP in Safe Mode.
4. Delete WgaTray.exe from c:\Windows\System32.
5. Delete WgaTray.exe from c:\Windows\System32\dllcache.
6. Lauch RegEdit.
7. Browse to the following location:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
   Windows NT\CurrentVersion\Winlogon\Notify
8. Delete the folder ‘WgaLogon’ and all its contents
9. Reboot Windows XP.

After you followed the process given above. Do following things

Go to Control Panel > Security Center > Automatic Update Settings.

Select the third option - “Notify me but don’t automatically download or install them”.

Click OK.

The next time the “Windows Updates” icon appears in the system tray, click on the icon and it will display a list of available updates (Windows won’t automatically download and install them anymore).

If “Windows Genuine Advantage Notification Tool” is there, uncheck it and press enter to download everything else (if you want to). You can right-click to “hide updates” that you don’t want.

Select “Don’t notify me about these updates again”, so that they will be ignored every time updates are downloaded.

Just remember, from now on, make sure to check the list of downloads so that you don’t install any new versions of this “tool”.

Next simple method is download Remove WGA. Run the application after restarting ur computer u'll find the notification been removed.