I reformated my computer and i still have the trojan virus. Can anyone help me? I reformatted my computer then install AVG then AVG's resident shield pop up with Infection: Trojan horse BHO.GKO Object: C:\windows\system32\sw20.exe Result: Moved to Virus Vault Object Type: File Process C:\WINDOWS\system32\MRT.exe then i tried another reformat and the same thing poped up. So i left it to avg and heal it. But soon after another trojan popped up when i havn't done anything. Threat name Trojan Horse BHO.GKO Process Name: C\Program Files\Spyware Doctor\pctsSvc.exe so i click heal and I scanned again with avg and nothing came up but as avg was done scanning it froze.. can anyone tell me how to fix this??