When you get a message on your computer screen showing that the copy of Windows XP you are using is not genuine or counterfeit do the following.
Go to this folder C:\Windows\Downloaded Program files; remove any files or folders associated with WGA.
Restart your computer and as soon as Windows logs off and restarts, press the F8 Key on your keyboard.
Windows Advanced Startup options will appear on your screen, select Safe Mode option.
Go to C:\Windows\System32 and the rename wgatray.exe to wgatrayold.exe.
Go to C:\Windows\System32\dllcache (Rename wgatray.exe to wgatrayold.exe)
Note: dllcache is a hidden folder, to view hidden folders do the following, go to Start, Control Panel, Folder Options,
Select the view Tab and under the Hidden Files option, select Show hidden files and folders
Go to the Safe Mode Registry
Click on Start, Run and within the open dialog box type regedit and click OK.
Within the registry locate the following folder:-
HKEY_Local_Machine\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon\Notify\WGALOGON
Right click and export the WGALOGON Folder (your doing this as a backup, just incase of any eventualities).
After exporting the folder, DELETE the WGALOGON folder
After deleting close all applications and reboot your machine back to Normal Mode.
After being prompted for successful validation, reboot your Machine.
