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When you log on to a non-genuine copy of Windows XP, the following notification error message “This copy of Windows is not genuine” will pop-up on the logon process:

And the nicely said “You may be a victim of software counterfeiting” message on the bottom right corner of log-in screen:

SOLUTION:

First Method

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.

Note: With this method, you may be prompted to install WGA Notifications again which can still be unselected.

Second Method

Another alternative is by using System Restore to restore the PC to a previous restore point that WGA Notifications hasn’t kicked in, and then carefully stop KB905474 from been applied to the system. To use System Restore, go to Start -> All Programs -> Accessories -> System Tools -> System Restore.

Note: Again, you may be prompted again to install WGA Notification, so it must be bypassed.