For some reason, microsoft has decided to integrate this little application in Windows operating system. The problem is, even if you legitimately purchased your copy of the operating system, the nagging application doesn’t stop.
Follow these steps to remove this software:
1.) First you need to start your system in “safe mode”
2.) Search for all WGA files (wga*.*) and delete all entries (you may not be able to delete WgaTray.exe and two other entries. Don’t worry!!!)
3.) Click Start -> Run, enter “regedit” and press the ENTER-Key
4.) Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify
5.) delete WgaLogon folder
6.) Restart your computer (normal mode)
7.) Search again for WGA files (wga*.*) like in step 2
8.) delete all entries
9.) Restart your computer (normal mode)
All traces of WGA should be gone.