I'm setting up an Active Directory environment for 5 users (very small) and I'm wondering what is the best antivirus for clients (Windows 7) and servers (Server 2008 R2 x64)?
I use Symantec Corp at my organization (50+ users) but I think that is overkill for this company. I wanted to use Microsoft Security Essentials for the clients (I use it for home machines and it's the best free AV in my opinion) but I don't think it will work on the Servers (3 servers, PDC, TS, and File). They are behind a Sonicwall TZ 200.
What would be the best? Free would be even better. Thank you!