syssmss.exe is a Trojan.Lanxue-K. syssmss.exe opens a back door. syssmss.exe spreads via open network shares. Related files: %Program Files%\Internet Explorer\syssmss.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill syssmss.exe process and remove syssmss.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.