click here Avast free Anti-Virus, I have read some excellent reviews on it recently. click here Sunbelt/Kerio Firewall, very stable it functions as a full version then after a month it reverts to a free edition with reduced features, the firewall still remains an excellent product & you wont miss the features that are removed.
click here Ewido when you install untick auto update and real time scanning and it then becomes a free program. You need to update manually before each scan. This program is as about as good as it gets.