ClamWin is a Free Antivirus program for
Microsoft Windows 98/Me/2000/XP/2003/Vista & Seven. ClamWin Free Antivirus
comes with an easy installer and open source code.
Avira AntiVir Premium - Antivirus is a
reliable antivirus, that constantly and rapidly scans
your computer for malicious programs such as viruses, Trojans, backdoor
programs, hoaxes, worms etc.