I have to agree with swagger here. Avira has some of the best detection rates out right now for a free anti-virus. I like to run the full scan with MBAM and SAS once a month or so and while the scan is running Avira will be checking the files along-side both of them; usually an Avira dialog will prompt for a decision on a suspicious file though the scan is being run through one of the others. The decision of still running an AV has been covered, but I'd just like to add that running 1 AV and multiple anti-malware/anti-spyware programs in realtime should not create any conflicts at all so there shouldn't be any reason not to have them, as long as they aren't hogging your cpu or memory. No program covers everything so a layered approach to your PC security is the way to go. The only path that leads to total security is to not have a computer but I'm sure most will agree that that's just insane and borderline heresy . exile360 - you stole my avatar