What's a good affordable antivirus solution (centrally managed) for a small business?

Symantec Endpoint Protection 12.1 with Symantec Endpoint Protection Manager

Protects your PC from viruses when others can't - Ever wonder why you have antivirus software and still get infected with a virus? With the combination of white listing, black listing and denying the unknown, Emmunize always knows what is trying to run on your computer resulting in the best protection on the market today. An independent lab test proves it Speeds up your PC - Other antivirus software slows down your PC because they have so much running in the background taking up your PC's resources. With Emmunize's approach, it doesn't need as many resources, which speeds up your PC! Automatic updating software that works around the clock - Do you ever wonder if your Antivirus is up to date? With Emmunize and cloud computing, Emmunize automatically updates 24/7 giving you the comfort that you have the most recent updates all the time. http://www.emmutec.com/idenitysafe

Norton 360, Really easy to use, does the job, no hassle. My 9year old sister uses it :) Not too expensive either.

avast