3. Start by searching your entire system boot drive for any file containing the letters "wga".

4. If WGA is installed on your computer, the search should return the filenames WgaLogon.dll and WgaTray.exe in your \Windows\System32 folder. You'll also find WGA's LegitCheckControl.dll in the same folder (but it won't be in your search results). You may well have several other search results, and we'll come back to those later.

5. In the search results window, rename the following two files as shown:

WgaLogon.dll => WgaLogon.old

WgaTray.exe => WgaTray.old