You might see this error message upon installing Google Ads Editor if your computer uses Norton AntiVirus software.
You can complete the installation safely by choosing "Allow this activity once" or "Allow the entire script once" from the drop-down menu.
If Norton AntiVirus is configured to stop all scripting activity, you won't see the warning and the installation won't finish. In this case, you'll need to change your Norton AntiVirus Script Blocking options, and retry the installation.