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