- Apparently calling something a server gives you a license to steal ($300+ for AV software because it is a "server", come on).
- Most free anti virus software that is out there is purposely engineered to not run on servers, there are hacks, but they are a pain and software makers close these holes fairly quickly.
- The best thing I learned: PC Tools makes a free AV program that works with Windows 2008 R2 64 bit without a problem. Don't know how good it is, but at least of got something.
Just shar'en the wealth.