How to Fix Unknown Publisher Security Warning?

Installing software from an unknown vendor can cause you a lot of trouble. However, there are ways to deal with it. Check out this piece to find out!

Software and applications have become crucial elements for all of us. And it is not uncommon to witness errors when downloading applications and software today. There are millions of websites on the web that can provide the software you need. Some of them may be safe, some may not, that’s why you may encounter security warnings from unknown publishers on your system.

Safe software versions will never face any issues with your PC as they are verified by the official brand, e.g. Microsoft. On the other hand, those downloaded from third-party websites can sometimes cause problems.

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Either way, the common problem of unknown publishers should never be taken lightly. It is a legitimate concern if you have this dialog box on your computer screen.

Wondering how to fix it and what it is? Well, take a look at this comprehensive guide!

How to get rid or fix unknown publisher security warning issue?

Ok, let’s tackle the question, How to fix the unknown publisher warning?

There are different ways to treat or fix it! Here are a few!

Fix the file registry

Corrupt file registries can somehow lead to the unknown publisher security warning message. Therefore, you can repair them to fix it. Here are the steps to do it!

  1. Walk in ordered in your PC’s search bar.
  2. Look for Command Prompt and right click above. Picking out Execute as administrator.
  3. Enter this command and press Enter: sfc/scannow
  4. When scanning is complete, to restartand your problem will be solved.

Change UAC settings

User Account Control settings can also cause these error messages. These settings can allow your PC to check every little thing the software does to it. If you change the user account settings, these error messages may be corrected. Here are the steps!

  1. Open the Control Panelfollowed by System and security.
  2. Go to the action center and choose Change User Account Control settings.
  3. Bring the scroll button down where it says Never notify.
  4. Click on OKAY.

To note: As these settings are meant to protect your PC from dangerous applications, make sure you have a strong anti-malware program installed on your PC to protect you from malware if it is indeed installed. Do this before running this method.

Run a system scan

Although it may seem like a primitive method, it’s worth trying and it’s quite easy.

  1. open up Windows Defender by typing it in the search bar.
  2. look for it shield icon and click on it.
  3. Click on To analyse options and choose Advanced to analyse.

Bypass error message

To bypass the error message, you must use the command prompt again. However, fair warning, this method is not recommended!

  1. Open Command Prompt by typing cmd and right click above.
  2. Picking out Execute as administrator.
  3. On the next screen, enter the application full path you want to run and hit enter.

To note: If you don’t know the full path of the application or software, check the properties of the software to get it under the shortcut tab.

Remove editor from unapproved lists

Even if the publisher is genuine, the PC may show you the same unknown publisher security warning error again and again. This may be possible if the publisher is listed in the list of untrusted publishers. Follow these steps to remove it in Internet Explorer!

  1. To research internet-options in the search bar.
  2. Press on Contents followed by Certificates.
  3. Select the Untrusted publishers tab and remove the software publisher.
  4. Run the application again.

Unlock file

This may be the easiest method you can implement. Right-click on the program and look for Block option. If it is checked, uncheck it and try to run the application or software.

Here are some methods on How to Fix Unknown Publisher Windows 10. Make sure that whatever method you try, you research it carefully and study the consequences.

Is it possible to check the verified publisher details of a program?

Yes, you can check the verified publisher details of the program in the properties of the software or application. Follow these steps to do the same!

  1. Right click on the software and choose Properties.
  2. look for it Digital signatures tab and click on it.
  3. You will see the name, email address, and timestamp of the signer of the certificate signature.
  4. Click on the Details tongue.
  5. In the next window, click Show certificate.
  6. Select the Details followed by the Object option in the list.
  7. In the next window you will see all the details of the editor.

To note:To verify the information, you should visit the official Microsoft website.

What is an unknown publisher security warning?

An unknown publisher security warning is a pop-up message that appears when you try to install software created by an unknown publisher or creator.

When your PC’s operating system or browser detects unverified software, it automatically triggers the alert. It will show you a dialog box in a bright yellow color, usually with the word “Unknown” printed against the editor.

Now, how does the PC or browsers know that the software is not verified or registered? Well, we’ll find out in the sections below!

Difference between dangerous software and safe software

Well, by just looking at the file, one cannot tell if the software is legit or not unless the icon of the software is distorted (an outdated way to tell if it has a virus or not). But hackers are aware today.

The naming of the software is done in such a way that you will surely believe that this is the right software for you. But, the only thing that differentiates legitimate software from bad ones is the error message.

Microsoft and various browser companies such as Google design the services intelligently to protect you from malware. The Microsoft Windows Defender security warning is the best example.

Here are some ways to make sure the software is legit!

  • Check source: One of the best ways to ensure that software is real is to verify its source. If you downloaded it from a legitimate source like the Microsoft website, it would be safe. The best thing here is that even though Microsoft’s software is safe, it will still ask you for permission.
  • Individual search: Another way to confirm if the software is original is to do your own research. Either way, you need to check out the official Microsoft website. You can check whether the name matches or has other variations or not.
  • Ask permission: This point is valid for those who are not yet over 18 years old. For you, it will be better to talk to your parents and find out whether the software is good or not.

To note: If you installed the software anyway and it installs additional software along with it, you should get rid of it as soon as possible.

How is a Verified Punisher different from a Verified Publisher?

Well, a verified publisher is someone who goes the extra mile to ensure that the app or software is trusted by your PC or browser. On the other hand, an unverified publisher does none of that.

This is how the software is verified. First, the software vendor strives to obtain the code signing certificate from the respected certificate authority and signs their software. Likewise, before a code signing certificate is issued, the certificate authority verifies the legitimacy of the company, which ensures that the software development company is genuine.

A code signing certificate is a digital file that allows the software manufacturer to gain the trust of users and the operating system. When software is digitally signed, it authenticates its originality.

Not all code signing certificates are the same; they come with two main levels of verifications, namely

  • Standard Validation: This process involves verifying some basic company information to obtain a standard code signing certificate, also known as an OV code signing certificate.
  • Extended Validation: In this process, the CA digs into some more specific information about the company or publisher before issuing the certificate.

Harmful effects of bad software!

Well, let’s waste no time and jump in!


Installing malware in your PC is one of the main reasons for malicious or unverified software.

According to statistics, 53% of viruses are spread via .exe files, and these executable files are usually labeled as bad by PCs.

Password theft

Keyloggers are the software used to track your keystrokes to form passwords. Some software is paired with keyloggers to steal your passwords. You will not receive any warnings about this software, but it may be automatically installed on your device.

Device control

An uncommon impact of unverified software is device control. A cyber thief can control your device according to his commands once you install the software.

Information theft

Much like password theft, once you install the software on your device, you risk losing some or all of your critical information.


Now that you know how to fix unknown publisher security error, it will be easy for you to run all your required software easily. However, it is recommended to use only legitimate software. If you think the software might cause problems for your PC but still want to try it, keep a strong antivirus as a backup plan. At least it will inform you in the remaining time to reverse the effects.

Verify your software/application code with trusted code signing certificate and get rid of unknown publisher warning message.

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