I am looking for a straightforward antivirus product for a single computer running Microsoft's Small Business Server 2003 operating system.
Norton AntiVirus/Internet Security/360 doesn't work on Windows Server systems.
You have to use Symantec AntiVirus (Endpoint Protection)
Trial: http://www4.symantec.com/Vrt/offer?a_id=48182 (This limited Trial will be active until December 30th, 2008, and will expire on that date.)
Symantec Endpoint Protection 11.0 Business Pack
5 users $22610 users $41625 users $818
Windows Operating Systems (32-bit and 64-bit versions)
For the best response, try posting in the Symantec Enterprise Forums for AntiVirus.
There are currently 7 users online.