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Microsoft recently released their free anti-virus, anti-malware and anti-spyware program called Microsoft Security Essentials.

Aimed at the consumer and small business market, this application really takes aim at the existing free anti-virus solutions out there, and even some of the pay solutions that consumers and small businesses use. 

The application is built on the same engine Microsoft’s enterprise solution (ForeFront) is built on, and integrates nicely into the operating system.  When I’ve tried other applications, including AVG Free, Avira, and Avast! I’ve always noticed the fact it was there in that my OS seemed to slow down to varying degrees when the software was scanning or downloading updates.

With Microsoft Security Essentials I haven’t noticed any impact to overall system performance.  In addition, the software caught a few things that the other applications mentioned above didn’t catch for whatever reason.

As a general rule of thumb I prefer built-in or integrated solutions simply because I feel there’s a better user experience, things are less intrusive and it just seems to perform better.

The big AV companies like Symantec, McAfee, Kaspersky and others surely must have at least a little trepidation over the fact the Microsoft has released a free anti-virus solution that they charge for.  Will Microsoft’s Security Essentials replace full-blown suites that Norton, McAfee and the others provide?  No, and it’s not intended to.  The others have firewall applications, inbound/outbound mail scanning, instant  messaging scanning, etc., that Security Essentials doesn’t have.  In my opinion however, those are all things you don’t really need in the first place and just slow your system down.  XP, Vista and Windows 7 has a firewall built-in, most people these days sit behind a cable, DSL or FIOS router which has firewall capabilities, and their IP address is masked behind the router’s NAT (Network Address Translation) feature as well.

Microsoft Security Essentials offers real-time scanning and virus, malware and spyware detection, so having an inbound/outbound mail scanner on top of real-time protection seems a bit like overkill to me as well.

What do you think?  Does Security Essentials fit the bill for you and your environment or do the added features offered by one of the bigger companies AV “Suites” fill the needs of your environment?