Solved: This app has been blocked for your protection [Windows 10]

One of the most distinctive features of Windows 10 is its high-security requirements and strict user protection policy, which is active by default. Advanced protection is good to have, but sometimes it works against the user – when you cannot install an app just because Windows thinks it is not safe.

Of course, such measures are meant to increase your safety and protect the system from malicious code, but what to do, when you know that software is ok and you really need it for your work? In today’s articles, we are going explain core principles of Windows 10 app-blocking mechanism and tell you how to fool the system.

Why Windows blocks apps?

In most cases, Windows’ behavior is fully justified, and you should not perform any actions to trick the system. Latest versions of this OS use advanced scanning algorithms, so the risk of installing/running potentially dangerous programs and malware is minimized. Windows 10 even analyzes driver signatures, checks digital certificates, monitors multiple accounts on the same PC, and much more.

The first thing to do when you see the “This app has been blocked for your protection” error message, is to stop for a moment and retrace your steps. Try to remember how you got that installer file that is causing the problem. It is highly likely that you have downloaded it from a random website. If it so, we recommend you to download the software you need from the official website. In case, you cannot find an official source, you should probably stay away from the suspicious software.

However, sometimes even installers downloaded from official or trusted sources are getting blocked by the system without any significant reasons. It happens, for example, when you need to install old drivers for your laser printer – the system thinks they are outdated, thus dangerous due to expired service support from the manufacturer (even though your printer is fully operational). Another possible reason for the block – expired installer certificates and wrong digital signatures of the app you want to install.

How to fix “this app has been blocked for your protection”?

When you are launching an app Windows sees as potentially dangerous, it immediately aborts the installation and block that app, then alerts you with the appropriate message. That message is sent by the User Account Control (UAC). Then you will see information explaining that the app was blocked according to the administrator policy on this computer, plus details about the name, publisher, and location of the blocked app installer.

Despite the fact that this error message is sent by the UAC service, you cannot allow the installation by simply disabling protection settings in UAC or changing them to minimal. Furthermore, you will get the same error after trying to run the installer as administrator. Windows 10 intentionally blocks installations of suspicious programs for inexperienced users in order to prevent possible system damage.

The most efficient way to deal with the block would be using Command Prompt. In the latest versions of Windows, this tool has become more functional. Now you can even use “copy/paste” functions from a context menu or use traditional combinations on your keyboard, which makes the process much easier. To disable system policy that prevents you from installing new software, you need to run Command Prompt as administrator (right-click on the Start Button and select that option or press Win+X > Command Prompt (Admin). Alternatively, you can click the Start button and type “cmd” in the search bar and select it from there (or press Win+R and type cmd in the small window that will appear).

When you have Command Prompt up and running, you need to type the directory with the installer file and run it. The easiest way would be to drag the file from the folder to the Command Prompt window and click enter to run and install it without errors.

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