Download the remover rmbugbear.exe and run it on infected computer. Then restart your PC normally and run the AVG Complete Test.
If the infected computer is connected to LAN, it is necessary to disconnect this computer from LAN before removing the virus and re-establish the connection in the moment when ALL computers in LAN are cleaned.
If you are using Windows ME or Windows XP operating systems, there might be a problem in removing infected files from the _Restore folder (Windows ME) or System Volume Information folder (Windows XP). For the correct removal of these infected files, it is necessary to disable the system restore function.