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