This App Has Been Blocked for Your Protection comes from Windows DefenderFix This app has been blocked for your protection on Windows 10Method 1. Open file blocked by Windows Defender by giving it an exceptionMethod 2. Open the blocked file from Elevated Command PromptMethod 3. Fix This app has been blocked for your protection via Local Group PolicyMethod 4. Temporarily disable Windows Defender SmartScreen
Windows Defender SmartScreen displays this User Account Control prompt to inform you that it has blocked the program for your security. Typically, it blocks applications due to unknown publisher or ones from suspicious online sources. As you can see in screenshot below, it lists the publisher as not trusted, then displays file origin and program location. This can happen if you are trying to download an unpopular or new application from a new developer, but the error might as well appear if you’re trying to install something dangerous. Besides, Microsoft tends to trigger this error to software that is discontinued and no longer supported by developers (due to security issues). According to user reports, This app has been blocked for your protection error often bothers users trying to install Rivatuner, Streamlabs OBS, D-Link Application Manager or others. It is as common as This Application Was Unable to Start Correctly error. Some users receive this error when trying to open Device Management. In such case, the error message shows Program location – C:\WINDOWS\system32\mmc.exe, C:\WINDOWS\system32\devmgmt.msc. If you are also dealing with this error, follow the steps given below to fix This app has been blocked for your protection on Windows 10. Note. Please bypass the warning ONLY if you are 100% that the application is secure. Otherwise, you can end up with a computer infection!
Fix This app has been blocked for your protection on Windows 10
We truly hope that you find these methods useful. Maybe you know another way to fix This app has been blocked for your protection error on Windows 10? Don’t hesitate, contribute to the community and share it with us. This method confirms that the file is safe and Windows Defender SmartScreen will no longer attempt to block it. You should be able to run or install it without problems now. In case it doesn’t, try running it as administrator – right-click it and choose Run as Administrator.
Method 2. Open the blocked file from Elevated Command Prompt
You can try this workaround for “This app has been blocked for your protection can’t install” problem. To clarify, this method force opens the app. Follow the steps given below: Now that you completed all the steps, the program should open and you should install it without problems. Do not forget to close the CMD!
Method 3. Fix This app has been blocked for your protection via Local Group Policy
You can disable Admin Approval Mode via Local Group Policy Editor on Windows 10. This bypasses the UAC prompts. As a result, it should allow you to run or install the application.
Method 4. Temporarily disable Windows Defender SmartScreen
4.1 Disable Windows Defender
Disabling Windows Defender can fix This app has been blocked for your protection: Publisher not trusted error. This particular method helps when dealing with blocked mmc.exe and devmgmt.msc (Device Manager) files on Windows 10. The method we provide also helps to bypass Microsoft Edge restrictions for files you want to download. However, you must remember that it is recommended to apply this method temporarily as leaving your PC without protection is never a good idea.
4.2. Enable Windows Defender SmartScreen back
You must have some kind of protection on your computer, especially when malware activity is so high nowadays. To enable Windows Defender SmartScreen back, complete steps listed in 4.1 method, but choose Warn Option in step #5.
