Nortonguard.exe is a mass-mailing worm W32.Mytob-DZ. Nortonguard.exe opens a back door. Nortonguard.exe tries to terminate antiviral programs installed on a user computer. Nortonguard.exe monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %System%\nortonguard.exe Removal: Kill nortonguard.exe process and remove nortonguard.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.