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