Defender SmartScreen prevented an unrecognized app from starting

In this post, we will show you how to bypass the warning Microsoft Defender SmartScreen prevented an unrecognised app from starting, Running this app might put your PC at risk warning in Windows 11 or Windows 10, when you try to open a file on your computer.

Defender SmartScreen prevented an unrecognized app from starting

Why has Defender SmartScreen prevented an unrecognized app from starting?

You may see this warning message Microsoft Defender SmartScreen prevented an unrecognized app from starting if the antivirus software does not have the files signatures stored in its data bank. This can happen if a program executable file is new to Windows SmartScreen or if it has not been so commonly downloaded or used.

Bypass Microsoft Defender SmartScreen prevented an unrecognized app from starting

If you see this screen, the first thing you can do is click on the More info link. A new Run anyway will appear Click on Run anyway and the program will start.

If you continue seeing this screen, you may need to unblock the file.

If you are sure that the file you have downloaded is safe like say our Ultimate Windows Tweaker v5 – then to bypass this warning on your Windows 11 or Windows 10 computer, do the following:

  1. Right-click on the file
  2. Select Properties
  3. Make sure you are in the General tab
  4. Press the Unblock button.
  5. Click Apply/OK and exit.
  6. The file will be unblocked.

But after clicking the Unblock button, you will now be able to access or open the downloaded file.

Similar messages you may see when a file is blocked are:

This post will show you how to add a File or Process Exclusion to Windows Security or Microsoft Defender.

Defender SmartScreen prevented an unrecognized app from starting

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Alice AUSTIN

Alice AUSTIN is studying Cisco Systems Engineering. He has passion with both hardware and software and writes articles and reviews for many IT websites.

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