I think the best free AV for office is Kaspersky free (european version is better)
- best behavior blocker and one of the best AV with signatures
- Has exploit protection and network attack blocker => almost all other free AVs don't have. I think it's crucial for office environment
Weakness: adwares, toolbars and PUPs
I read the website and i think the best here, among those mentioned, is Comodo. The FAQ page on Nano website says "NANO Antivirus with a free license can only be used on home computers" and i don't know how good is Immunet.Comodo can be used on commercial environment too:
Others here:Hi my name i Anto and I've a company with 7 pc. Can i use CIS or CAV for free? CIS and CAV are for business/commercial use? thnks a lot.forums.comodo.com
There are nearly 30 different antivirus free to use but most of the end user license agreement states that they are for personal home use only. We've reviewed all of the free antivirus EULA and compiled a list of those that can be commercially used in corporate and business without restrictions.www.raymond.cc
From the various eula:
Exactly.I don't think that the OP is asking opinion on the best free AV in general, but a solution that can be used commercially / professionally without having to pay for a licence.
The request for a free antivirus that can be used in the commercial environment is more for the knowledge itself rather than the really need of a free product.Is free versions and especially in a genuine " commercial / business environment " something to seriously recommend? Things like professional support 24/7 is normally extremely crucial even for small companies.