lockx.exe is a worm W32.Sdbot-ADD. lockx.exe opens a back door. lockx.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\lockx.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill lockx.exe process and remove lockx.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.