Jbotz has a point, if the big AV developers are being focused on..
Been using Symantec CE AV for over 7 years, on multiple networks; as of yet not one virus has infiltrated any of my client's networks.
Synmantec CE uses little resources, has negligable affect on performance. The program does need to be tweaked to get the best performance; Symantec's defaults are overly protective. Setup is relatively easy, the management interface is a bit awkward but easily understood. Once setup properly, you won't need to revisit the interface often.Roll out to clients is simple, has a small footprint on the wks. Never had CE interfere will any programs on servers or WKS