msstill.exe is a worm W32.Sdranck-V. msstill.exe opens a back door. msstill.exe spreads via open network shares. Related files: %System%\msstill.exe %System%\rapking.exe %System%\richword.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill msstill.exe process and remove msstill.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.