I like Avast
. I've used it for going on 6 years now without a single nasty getting through.Microsoft Security Essentials
is also very good. I've not used it myself but I've heard good things from people who know what they're talking about.
Another good one is Eset Smart Security
Whichever AV you choose to go with, I always recommend having a second scanner installed and updated so that you can have a second opinion. For this, I have Malwarebytes Antimalware
. It's a very bad idea to have more than one security program doing real-time scanning (that is, looking at files and websites as you open them) so I just get the free version of MBAM since it doesn't do any real-time scanning. Another popular auxiliary scanner is SuperAntiSpyware
, though its longterm availability as a free tool has been somewhat cast into doubt by a recent merger with another company.
A good plan would be to have both a primary security scanner and an auxiliary scanner. Use the primary scanner for real-time on-access scanning and weekly full system scans. Use the auxiliary scanner for weekly full system scans to make sure that the primary didn't miss anything.
Edited by Andrew, 12 August 2011 - 11:55 AM.