Msfiles.exe is an adware program Adware.Adtest. Msfiles.exe monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %System%\intnets.exe %System%\scridows.exe %System%\sysinfer.exe %Windir%\msfiles.exe Adds the value: "intnets" = "%System%\intnets.exe" "sysinfer" = "%System%\sysinfer.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill msfiles.exe process and remove msfiles.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.