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This app has been blocked for your protection — what does it mean?

Have you ever seen a pop-up that says something like “This app has been blocked for your protection” or “Windows Defender has identified this as potentially harmful software”? If so, you may be wondering what it means and why your computer or device is blocking the application. In this blog article, we will discuss the meaning behind these messages and how to handle them. You’ll also learn what measures you can take to protect yourself from malicious programs in the future. Read on to find out more!

What is the app block message?

If you've ever seen a message that says "This app has been blocked for your protection" in Windows 10, you're not alone. This error is caused by a security feature called User Account Control, which is designed to prevent malicious programs from making changes to your computer. When User Account Control is turned on, any time a program tries to make changes to your system, you'll see a prompt asking if you want to allow the change. If the program is from a trusted source, you can click "Yes" to allow the change. However, if the program is unknown or seems suspicious, you should click "No" to block the change. The "This app has been blocked for your protection" error occurs when User Account Control is blocking an unknown or suspicious program from making changes to your system. To fix this error, you'll need to find and run the program as an administrator.

How to fix an app block

If you see the message "This app has been blocked for your protection" in Windows 10, it means that Microsoft Defender SmartScreen has prevented an unrecognized app from starting. This is a security measure to protect your PC from malicious software. If you trust the app and want to start it anyway, you can do so by following these steps: 1. Press the Windows key + R on your keyboard to open the Run dialog box. 2. Type "powershell" into the Run dialog box and press Enter. 3. In the PowerShell window that opens, type the following command and press Enter: Set-ExecutionPolicy Unrestricted 4. You will be prompted with a message asking if you're sure you want to change the execution policy. Type "Y" and press Enter to confirm. 5. Close PowerShell and try to run the blocked app again. It should now start without any problems.

Why this happens

When you see this message, it means that Windows SmartScreen prevented an unrecognized app from starting. This is because, by default, SmartScreen is turned on in Windows 10 and 8.1 to help protect your PC from malware. If you trust the app and know that it’s safe to run, you can tell SmartScreen to stop blocking it. When you do this, the app will be allowed to run and will no longer be blocked. The message you see is part of SmartScreen's work to protect your PC. It's a security feature that helps guard your PC against malicious software and unwanted apps, and we recommend that you keep it turned on.


This app has been blocked for your protection is a message that may appear on your computer if there is an issue with the program or application you are trying to access. It can be very frustrating, but understanding why it happens and how you can fix it can help alleviate any anxiety and make sure your system remains safe from potential threats. Always remember to keep all of your software updated so that potential security risks are minimized. With this knowledge in mind, now you should have a better understanding of why apps might get blocked and what steps you should take to protect yourself online.

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