- Avast! free antivirus:
http://www.avast.com/eng/download-avast-home.html- Avira free antivirus:
http://www.free-av.com/en/download/index.html- free PC Tools Firewall Plus:
http://www.pctools.com/firewall/- free Comodo Internet Security (firewall + AV):
http://www.personalfirewall.comodo.com/NOTE. During installation, Comodo will also allow you to install AV only, or firewall only, if you prefer to combine one Comodo product with some other product.
If you decide to install Avast, or Avira, make sure, Windows firewall is turned
on, or use PC Tools Firewall Plus.
If you decide to install Comodo, make sure, Windows firewall is turned
off.
IMPORTANT! Make sure, you use only ONE antivirus, and ONE firewall.Make sure to uninstall any pre-installed AV/firewall.