protect the computer against viruses : ClamWin Free Antivirus

protect the computer against viruses : The OpenAntivirus Project

protect the computer with a firewall : PktFilter

protect the computer with a firewall : Winsock Firewall

Check out more free software : I want a Freeware Utility to ... 450+ common problems solved.

Suggestions/corrections : eConsultant : Blog Archive : I want Open Source Freeware