Firstly, Although possible, Ive never come accross a Windows geniune virus.
1. Lauch Windows Task Manager.
2. End wgatray.exe process in Task Manager.
3. Restart Windows in Safe Mode. (By pressing F8)
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
I am not liable for anything that breaks
That will get rid of it as far as I Know.
If it is a scam, Its definetely the first of its kind and I'd love a peek!
EDIT: Oh I didnt realise it had been solved! I wanted it to be a virus =[