It recently came up in this thread
http://forum.avast.com/index.php?topic=21952.0
that Microsoft published a removal procedure for the pilot version of WGA Notifications. I’ve successfully tested this procedure on the general release version (1.5.0540.0) three times but, in doing so, I found that the procedure also unnecessarily removes Windows Genuine Advantage.
The following abbreviated version of the Microsoft procedure disabled and removed WGA Notifications on two test machines while leaving Windows Genuine Advantage intact.
If you decide to try either of this please remember that deleting system files and editing your registry can harm your computer. Create a restore point, back up your data and your registry prior to making any changes.
[b]Manual Removal of WGA Notifications (tested on version 1.5.0540.0)
Either turn off Automatic Updates or set it to “Notify me but don’t automatically download or install them”.
Rename the following files:
%windir%\system32\wgalogon.dll to %windir%\system32\wgalogon.old
%windir%\system32\wgatray.exe to %windir%\system32\wgatray.old
Reboot (after reboot WGA Notifications is disabled)
Delete the following files:
%windir%\system32\wgalogon.old
%windir%\system32\wgatray.old
Delete the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WgaNotify
Run the Windows Updates utility and hide WGA Notifications.[/b]
You can now change Automatic Updates back to your old setting but if you use one of the automatic options you run the risk of installing a newer version of WGA Notifications without prior notice.
If you try this please post your results.