AVG came bottom in recent tests, don't bother with it. Avast if you insist on paying nowt, or else fsecure or sophos. depends what malware/virus you have as to how to get rid of it, first port of call is to boot in safe mode (hit f8 before windows starts and select safe mode from list) and try to delete it from there. failing that then you'll need to identify it and search for specific removal tools/instructions. any half decent antivirus will ID it for you
