mssnt.exe is a Trojan W32.Sdbot-AGJ. mssnt.exe opens a back door. mssnt.exe spreads via open network shares. mssnt.exe tries to terminate antiviral programs installed on a user computer. mssnt.exe monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %System%\mssnt.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill mssnt.exe process and remove mssnt.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.