AVG AntiVirus Free - Version 2013 There's a new file reputation system, which AVG also uses in conjunction with its scans to scan dramatically faster than before. Basically, it looks at a file in the order that its bits were saved to disk, not in order of the directory file tree. It may sound hokey, but as the benchmarks below show, it's an effective technique. By cross-referencing that data with what other AVG users are running, AVG is able to create a more effective net for blocking malicious files.