Msapplg.exe is a Trojan.Delf-KS. Msapplg.exe downloads code from the internet. Related files: %Windows%\services.exe %System%\msapplg.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill msapplg.exe process and remove msapplg.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.