However, there is a drawback to this approach. If you wish to implement a cloud-based system, you will need a site license for every product you are planning on implementing. Such an approach can get costly. Personally, I do not believe this to be a viable solution because it is trivial for an attacker to create a virus that can bypass many if not all antivirus products buy testing it at sites line Virus Total, a free website service that scans files for obvious viruses, worms, Trojans and other malware.
I would also recommend looking into other products that take an application whitelist approach to malware defense. With whitelisting, an organization's systems are only allowed to run software that is approved by the IT department. Anything new (including many types malware) is denied by default. Products from Lumension Security Inc., CoreTrace Corp., as well as Cisco Systems Inc's Security Agent show promise in this area.
This was first published in January 2009