mspostsp.exe is a Trojan.Jupdrop-B. mspostsp.exe opens a back door. Related files: %System%\mspostsp.exe %System%\msupdate32.dll More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill mspostsp.exe process and remove mspostsp.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.