if you know where to look NOD32 can be gained for free
but if you dont wanna break any laws i usually install avg on peoples computers and they never get viruses , i even use it on one of my own
I like AVG free edition, claimwin AV is also good too. Adaware, windows defender and spybot are a good combination for antispyware and hijackthis is a necessity, it lets you delete stuff that a lot of other programs miss.
Do you get updates?? EDIT - I looked into it, apparently it does . Something to give a try...
I use AVG Free and Ad-Aware. I have a router, so I just use Windows Firewall. I also do HijackThis scans from time to time. Never had a problem with that combination.