But you can run SCANS with the others in the non-realtime mode. There are many WEB BASED SCANNERS listed in our forum sticky which are fantastic since you get the latest definitions.
I have heard that you shouldnt run more than AV as they can cause conflicts between each other, however I also hear that you should run more than one so what one misses the other hopefully catches. My system seems slow and i wonder if this could be the reason. Thanks for any info..