Anti-virus software programs are a necessity in today’s computing environment. No user should be without active anti-virus protection. That having been said, there is a performance cost to running anti-virus software. Indeed, your computer will take more time to complete certain functions; starting up is a good example of where you will experience a noticeably slow computer.

A/V: A Diminishing Return

With anti-virus software, you can be over-protected. That’s a nice way of saying that you shouldn’t have more than one anti-virus program installed at any given time. To be sure, some AV programs have advantages over others. Some are updated more frequently; others are better at detecting obscure infections. Others provide a balance of good protection at a reasonable cost.

What you don’t want is competition on your system. Anti-virus programs, by their nature, examine the activities of other programs. More than that, they limit the activities of other programs, including other anti-virus programs you may have installed.

AV programs compete for access to the same resources and can throw up unnecessary warnings, cause conflicts and crash the system when confronted with another AV program that is scanning the computer. Some AV programs make nice with each other, so these dire results aren’t always a foregone conclusion. Some users rely on two or even three AV programs that run simultaneously to protect the system.

AV software may work pleasantly in conjunction with a firewall, but throw in an extra measure of protection and you could be in a very slow world of hurt. The rule of thumb is that you should choose one AV program and one firewall program to protect your computer from malware and possible intrusions. Test your protective software for compatibility and if you find a good match, stick with it.

If you find that your combination has produced an unacceptably slow computer, switch out the test components one at a time. You may find that certain firewall/AV combinations don’t work well together, while others produce a perfectly harmonious result. Ultimately, the combination you choose should be one that provides good detection of viruses, as well as good prevention.

Also, don’t assume that firewalls come configured for your system right out of the box. Simply installing a firewall does not always equal protection. Frequently, their default state is either “minimal” protection or “off,” so make sure your firewall is actually configured to do something useful once you have it installed.

Finding a combination of AV and firewall protection that works well together doesn’t mean you can never change your protective software suite. Just don’t expect exceptional results from combined software suites that are designed to interfere with other software on the same computer!

Photo Credit: Dmuth, via Flickr