What is the best Antivirus for Windows client computers in an organisation?

For business environment Kaspersky Endpoint Security for Business Advanced is the best. 

2. Trend micro worry free business security

3. Bitdefender Endpoint Security

Microsoft Essential and Kaspersky Internet Security are fore home users.

For me, Kaspersky internet security2015.

Every antivirus and firewall will work less well in a corporate network because there is a lot of ongoing network connections, much more than on home computers.

I recommend Eset products.

Microsoft essential is the most stable and powerful and easy to use as well

Dear i love McAfee but you can use Microsoft security essentials its a free antivirus.

Please check it only time then give your comments. i now you like it.

For an organization I recommend to use McAfee, since I am using it past few years and found quite useful. Microsoft Security Essentials is good for stand alone computers it is free and won't use too much resources.

1- Kaspersky Endpoint Security for Business has so many futures and cababilities.

2- McAfee they also got many great futures that can be integrate together in a signal management consol.

Trend Micro is really good

Dear Guys, Bit defender is the one which rewarded as the best anti-virus for last three years, continuously. Microsoft security essential enable 'automatic windows updates' every time it checks update for virus definition which will end up in severe internet bandwidth consumption and windows genuine licence detection. If you have a windows copy paid $199 then it's fine. Otherwise Microsoft will ask you to purchase a windows OS copy. Around Two years before Microsoft Security Essential was denied to be even an anti virus by the anti virus testing and grading companies. links are below. Even though I prefer AVG Internet Security on my laptop. I think it is giving me more control over threats to reduce false positives.

http://www.av-comparatives.org/ 

http://www.av-test.org/en/

http://www.toptenreviews.com/

kaspersky total security, all integrated there