The app you’re trying to install isn’t a Microsoft-verified app

When you run a setup file downloaded from the internet (i.e., non-Store app), the setup doesn’t run, and the following message may appear:

The app you're trying to install isn't a Microsoft-verified app

Installing apps from the Store helps protect your PC and keep it running smoothly.

Cause

This can occur if your system settings disallow installing non-store apps.

Another possibility is your system is in S Mode.

Resolution

Please follow one of the methods below to run the installer.

1] Unblock the executable

Right-click on the setup file you’re trying to run, and click Properties.

Click Unblock, and click OK.

2] Configure the system to install apps from anywhere

Select Start → Settings → Apps → Advanced app settings.

Next to “Choose where to get apps”, select “Anywhere“.

Restart Windows if necessary.

3] Switch out of S mode

If the “Choose where to get apps” option is missing, your system may be in S mode. In that mode, you can’t install apps from outside the Store.

To check if your PC is using S-Mode go to Settings → System → About. On the About page, scroll down to the “Windows Specifications” section. If you see the words “in S mode” to the right of the Edition entry, you’re using an S Mode PC.

To switch out of S mode, please open the following link in the Win + R (Run) dialog.

ms-windows-store://pdp/?productid=BF712690PMLF&OCID=windowssmodesupportpage

See also: Switching out of S mode in Windows – Microsoft Support

4] Delete the SmartScreen policies

Open the Registry Editor and go to this branch:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\SmartScreen

Delete all the values in the right pane of the above key.

One of the above methods should let you install non-Store apps (i.e., downloaded from anywhere.)