MSAOLdrv.exe is a Trojan W32.Rbot-ASP. MSAOLdrv.exe opens a back door on IRC channels. MSAOLdrv.exe spreads via open network shares. Related files: %System%\MSAOLdrv.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill MSAOLdrv.exe process and remove MSAOLdrv.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.