Startest is not a full fledged antivirus program like most of the others on this page. It checks your boot sector and certain Windows system files for changes. If they have been modified, the program will inform you and also display the changed code.
Size: 1.1MB
VCatch Basic is a free virus protection software that monitors files received by your system by certain programs such as certain email clients, web browsers, and file sharing software. It supports Microsoft Outlook, Outlook Express, Eudora, Netscape Messenger, Internet Explorer, Netscape, etc.
Size: 400KB
ArcaMicroScan is a free scanner for a quick and complete virus check as well as cleaning of any possible infections. For OS: Windows 98/Me/NT/2000/XP/2003.