The antivirus is McAfee 8.0 virus scan enterprise.
I think that the antivirus gets reenabled by the server, cant seem to find a disable button for long term.
Could uninstall it then reinstall it when ive finished sniffing but the time it would take to do so would probably get me caught.
Ill have a read though the McAfee readme files.
Could disconnect the network cable, disable the antivirus, download cain and abel, install it then plug network cable back in.