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How to fix “This app has been blocked for your protection” error on Windows 10

Although security tools like Defender SmartScreen are built into Windows 10, they occasionally get in the way.

While using Windows 10, Windows Defender SmartScreen serves as a protection tool. If an app originates from or was created by an unknown source, it will prevent you from opening it. The error notice “This app has been blocked for your protection” will then appear.

The instructions in this article will help you fix the “This app has been blocked for your protection” error by unblocking the opening of applications in Windows 10 caused by Windows Defender SmartScreen, but be careful when using them. Some apps might be really dangerous and bring you into trouble. Apply the following advice only if you are certain that the file is secure.

Error message "This app has been blocked for your protection"
Error message “This app has been blocked for your protection”

How to open files blocked by Windows Defender SmartScreen

You can rapidly provide permission to open a file if trying to launch one that you know is secure creates problems.

Step 1: Go to the program or file that SmartScreen is preventing from running.

Step 2: Right click on file.

Step 3: Click on Properties.

Step 4: To make the checkmark visible, select the checkbox next to Unblock

To make the checkmark visible, select the checkbox next to Unblock
To make the checkmark visible, select the checkbox next to Unblock

Step 5: Click on Apply.

Now, SmartScreen considers the file safe and you are allowed to open it. The error “This app has been blocked for your protection” has been fixed.

Should I disable Windows Defender SmartScreen?

Although not recommended, SmartScreen can be disabled through Windows Defender. If you must completely turn off SmartScreen at some point, you should turn it back on immediately.

To know how to enable / disable the Windows Defender SmartScreen tool, please refer to the article: Instructions to enable or disable SmartScreen on Windows 10 for more details.

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