limited_edition,
I use the programs you mentioned, but I also use a² free scanner
http://www.emsisoft.com/en/software/free/. The free version will scan for all types of malware (trojans, backdoors, hacktools, batch viruses and trojans, internet worms, irc worms, java scripts, webserver scripts, vbs scripts, virus construction kits, denial of service tools (DoS), distributed denial of service tools (DDoS), flooder, keylogger, nuker, sniffer and unix viruses) and can be updated manually.
There is going to be an update of the program soon which will be faster, but in the meantime, it might be a good idea to use the version out now until the other is released.
Do you use a firewall? If not, there a some good free ones available, like ZoneAlarm, Sygate, Kerio, Outpost 1. If you want there links, I will post them.