- Launch Windows Task Manager.
- End wgatray.exe process in Task Manager.
- Restart Windows XP in Safe Mode.
- Delete WgaTray.exe from c:\Windows\System32.
- Delete WgaTray.exe from c:\Windows\System32\dllcache.
- Launch RegEdit.
- Browse to the following location : HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\Notify
- Delete the folder ‘WgaLogon’ and all its contents.
- Reboot Windows XP.