Privacy

This is not for me but for family and friends who are mostly oblivious to privacy issues. I can generally steer them towards more privacy orientated software but not for anti-virus/malware. I know prevention is better than cure and altering behaviour to avoid them to start with is the best defence but I cannot for the life of me understand how some family end up with so damn much malware on their PCs. They're not going to change their behaviour any time soon, if ever. So antivirus it is.

Apart from ClamAV, is there any anti-malware software that respects privacy? Paid is fine (since most are already paying anyway).