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