Hi and thanks for your time. I have a real problem here. First of all, AdAware is in overdrive, constantly performing scans because it is detecting malicious processes. Each time it detects hundreds of infected files, including "Ramnit.a!dam" Malwarebytes Anti-Malware scan finds two files, one of them is "Trojan.Fake.Alert.H". One is a registry entry. When these are removed, they are back after next startup. I also had AVG installed but that was constantly flagging up hundreds of files as infected - I uninstalled it as the computer was unusable, and I wondered if it was conflicting with AdAware. AVG detected "Trojan Horse Hider" and hundreds of files with "Win32/Zbot.G" (or similar). I have tried to use ComboFix, but apparently with no effect. Edit: all anti-virus websites are blocked, and I am unable to update any virus program i already have. Help! Many thanks, Stu. p.s. - I run Windows XP.