Disable WGA Notifications Warning Message
Solution :
1. Open 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. Open Regedit ( Start > Run > Type regedit > OK )
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
Hope this will help....