I realise there's a very similar thread not a million miles from here but I'm specifically talking about free apps (unless I really need to fork out). I've been using Norton Systemworks until recently and it's always done well for me. It updates itself, I've never had any nasties in and it didn't hog resources as others have complained about. My suscription has ended though and I'm not renewing it so I need a decent anti-virus app and firewall. Is the Windows firewall any good on its own? I've enabled it for now as I've got nothing else but need something in its place asap if it's not up to the job. As for the anti-virus, what would you recommed? I've heard good things about Avast?