If you detect malware before executing it, no harm is done. So the detection is what counts. Cleaning is of minor importance. I do think that most forum úsers here don't rely on an AV to be able to disinfect malware. We rely on proactive measures like hips and virtualization to not get infected in the first place. And if we by get infected somehow, then we reformat or go back to a clean disk image if existing.