Right now I am using Avast! Rescue Disk. I have caught many virus/torjans/rootkits. But I want to make sure it is the best or get the best, most thorough scanner. I have looked around, I know AVG, Kapersky, ESET, and a few others are out there, along with the utility disks like Hiren's Boot CD, and TDK, etc. So, is Avast RD the best for scanning not on using the OS, or are there more reliables. If there are supporting studies please link.