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Having a hard time unblocking an application publisher on your Windows PC? It’s blocked and you’re not even sure why that’s the case? We have a plethora of applicable solutions for you.

We all have third-party applications on our PC, but few users reported certain issues while installing or running specific applications. According to them, it seems that a specific publisher is blocked on their PC, so today we’re going to show you how to unblock publisher on Windows 10.

How to unblock a publisher on Windows 10?

Solution 1 – Use Command Prompt

According to users, one way to circumvent the problem is to use the Command Prompt to run the application. This isn’t a permanent solution, but it will allow you to install the desired application even if your publisher is blocked. To do that, you need to use Command Prompt and follow these steps:

Press Windows Key + X to open the Win + X menu and select Command Prompt (Admin).

If you’re not experienced with Command Prompt, you can simply copy the exact path to the setup file. To do that, follow these steps.

Locate the setup file, hold the Shift key and right-click the setup file. Choose “Copy as path” from the menu.

Now switch back to Command Prompt and press Ctrl + V to paste the file path. Now press Enter to run that file.

As we already mentioned, this is just a workaround and not a permanent solution, so you’ll need to use this method whenever you try to run an application that is blocked on your PC.

Solution 2 – Reinstall the problematic application

If you’re getting the message that a specific publisher is blocked, you can fix it sometimes simply by reinstalling the problematic application. To do that, follow these steps:

Now navigate to Apps & features section, select the problematic application on the list and click on Uninstall.

Alternatively, you can use Programs and Features to uninstall applications. To do that, follow these steps:

Press Windows Key + S and enter programs. Choose Programs and Features from the menu.

List of installed applications will now appear. Double click the problematic application to remove it.

After uninstalling the problematic application, try to install it again and check if that solves the problem.

Solution 3 – Download the application from a different source

If you can’t install an application because the publisher is blocked, you might want to try downloading it from a different source. Be sure to download the application from the original source. If that doesn’t work, try downloading the application from a third-party source and check if that solves the problem.

Solution 4 – Check if the publisher is blocked

Sometimes these types of problems can occur if the publisher is blocked on your PC. If you manually blocked a certain publisher, it will appear in Internet Options. To check if a certain publisher is blocked, do the following:

Press Windows Key + S and enter internet options. Select Internet Options from the list of results.

Go to the Content tab and click on the Certificates button.

Click the right arrow in the Certificates window and navigate to Untrusted Publishers tab. Select the publisher that you want to unblock from the list and click the Remove button.

As you can see, this is a simple solution, but it works only if you blocked a publisher manually.

Solution 5 – Reset Internet Explorer

According to users, you can sometimes fix the problem with blocked publishers simply by resetting Internet Explorer to default. To do that, follow these steps:

Navigate to Advanced tab and click on the Reset button.

Check Delete personal settings option if you want and click the Reset button.

Solution 6 – Unblock the file manually

According to users, you can unblock a publisher simply by changing file properties. Many blocked files have an Unlock option that you need to check if you want to run them. To do that, follow these steps:

Right-click the setup file that you can’t run. Choose Properties from the menu.

Solution 7 – Check the certificate and download the file again

Many developers use digital certificates in order to protect their software from tampering. However, if the certificate is expired you might have some issues installing that application. In addition, if the certificate is expired Windows will block that publisher in order to protect you. To check the status of the certificate, you need to do the following:

Navigate to the Digital Signatures tab and click on Details button.

In the General tab click on View Certificate button.

Look for the Valid from the field and check if your certificate is still valid.

If the certificate is expired, you need to download the installation file again and install the application using that file.

Solution 8 – Try using a different web browser

Few users reported that they got the publisher blocked message while trying to install a certain application. According to them, you can fix the problem simply by downloading the setup file again using a different browser. Users reported that their publisher was blocked after using Internet Explorer to download files. To fix the problem, open Microsoft Edge or any other web browser and try to download the file again. After doing that, run the setup file and check if the problem is resolved.

Solution 9 – Make sure that you download the latest version

Several users reported that they had this issue while installing a certain driver on their PC. According to them, the driver wasn’t the latest, and it wasn’t fully compatible with Windows 10, thus causing this problem to occur. To fix the problem be sure that you’re downloading the latest version of the software that you’re trying to install. By doing so, you’ll ensure that most compatibility issues don’t occur.

Solution 10 – Use Task Manager

Task Manager is a useful tool that can close any application or disable startup items. However, you can also use Task Manager to start any application on your PC. Few users also reported that they fixed the problem with the blocked publisher on their PC simply by running the setup file from Task Manager. To do that, you need to follow these steps:

When Task Manager opens, click on File menu and choose Run new task.

Check the Create this task with administrative privileges box and click on Browse button.

After doing that, click the OK button or press Enter to run it.

We have to mention that this isn’t a permanent solution, so you’ll have to repeat it every time you encounter this issue.

Solution 11 – Use the hidden administrator account

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Few users reported that they managed to fix this issue simply by using a hidden administrator account to install the application. This account is hidden by default, but you can enable it by following these steps:

If the process was successful, return to your main account and check if the application is working properly. If so, open Command Prompt as administrator and enter net user administrator /active:no. Press Enter to disable administrator account. We have to mention that this isn’t a permanent solution, so you’ll have to install other applications using this method.

Solution 12 – Change Group Policy and use File Unsigner

If certain applications are blocked from installing, you might be able to solve this problem by changing Group Policy settings. To do that, follow these steps:

Press Windows Key + R and enter gpedit.msc. Click OK or press Enter.

When Group Policy Editor opens, in the left pane navigate to User Configuration > Administrative Templates > Windows Components > Attachment Manager. In the right pane, double click on Include list for low file types.

Select the Enabled option and in the Options sections, add .exe. Now click Apply and OK.

Now locate the setup file and drag and drop it to the FileUnsigner icon. If the process was successful, you’ll see a Command Prompt message saying that the file was unsigned successfully.

Solution 13 – Turn off SmartScreen Filter

SmartScreen is a useful feature that can protect you from malicious websites and files, but it can also prevent certain applications from running. To fix the problem with blocked publishers you might have to disable SmartScreen. To do that on Windows 10, follow these simple steps:

Press Windows Key + X and select Control Panel from the list.

When Control Panel opens, click on Security and Maintenance.

Security and Maintenance window will now appear. Click on Change Windows SmartScreen settings in the left pane.

Select Don’t do anything (turn off Windows SmartScreen) and click OK.

After turning off SmartScreen try to install the application again. Disabling SmartScreen can slightly affect your security, but if you have an antivirus you shouldn’t have any problems.

Solution 14 – Temporarily disable your firewall

A firewall is important because it can prevent certain applications from accessing the Internet. However, sometimes Windows Firewall can interfere with certain applications and cause this problem to occur. If you have problems installing applications because your publisher is blocked, you might want to try disabling your firewall temporarily. To do that on Windows 10, follow these steps:

Press Windows Key + S and enter firewall. Select Windows Firewall from the list.

When Windows Firewall opens, select Turn Windows Firewall on or off from the menu on the left.

Select Turn off Windows Firewall (not recommended) for both Private and Public network settings. Now click on OK to save changes.

After turning off the firewall check if the problem is resolved. If turning off the firewall fixes the issue, it means that there’s a firewall configuration issue that you need to resolve to completely fix this problem.

Solution 15 – Disable the security warning

You might be able to fix the problem with blocked publisher simply by changing a few options. To fix the problem, do the following:

After you open Internet Options, go to Security tab and click on the Custom level button.

In Miscellaneous section locate Launching applications and unsafe files option and set it to Prompt or to Enable. Click OK to save changes.

After making these changes, try to start the application again. If the issue still persists, try disabling User Account Control. To do that, do the following:

Press Windows Key + S and enter user. Select User Accounts from the menu.

Click on Change User Account Control settings.

Move the slider all the way down and click on OK to save changes.

After disabling User Account Control try to install the application again.

Solution 16 – Run the application in Compatibility Mode

If you have problems installing certain apps, you can unblock the publisher simply by running the application in Compatibility Mode. To do that, follow these simple steps:

Go to the Compatibility tab. Check Run this program in compatibility mode for and choose a desired version of Windows. Now click Apply and OK to save changes.

Solution 17 – Disable Always ask before opening this file option

Windows usually give you a security warning when you try to open a downloaded file. To fix the problem with blocked publishers you just have to disable one option when running downloaded files. To do that, follow these steps:

When the security warning opens, uncheck Always ask before opening this file option. Now click the Run button.

After doing that, you should be able to start the application without any issues.

Solution 18 – Change Group Policy settings

If you have problems running downloaded files, you might have to change one setting in Group Policy Editor. To do that, follow these steps:

When Group Policy Editor starts, in the left pane navigate to the User Configuration > Administrative Templates > Windows Components > Attachment Manager. In the right pane double click on Do not preserve zone information in file attachments.

Select Enabled option and click on Apply and OK to save changes.

You can also achieve the same results by modifying your registry. To do that, follow these steps:

Press Windows Key + R and enter regedit. Press Enter or click OK.

When Registry Editor starts, navigate to
HKEY_CURRENT_USERSOFTWAREMicrosoft
WindowsCurrentVersionPoliciesAttachments
in the left pane. If you don’t have Attachments key, right-click Policies and choose New > Key. Enter Attachments as the name of the new key.

After you navigate to the Attachments key, right-click the empty space in the right pane and choose New > DWORD (32-bit) Value.

Enter SaveZoneInformation as the name of the new DWORD and double click it. Set its Value data to 1 and click OK to save changes.

Solution 19 – Use PowerShell

This issue can affect multiple files, and if you can’t install new applications you might be able to fix this problem by using PowerShell. We have to mention that PowerShell is an advanced command line tool, and you can cause certain issues with it if you’re not careful. In this solution, we’ll assume that all your setup files are located in the Downloads folder. If you store your downloaded files in a different location, be sure to use that location instead. To use PowerShell, do the following:

Press Windows Key + S and enter PowerShell. Right-click PowerShell from the list of results and choose Run as administrator.

If the process was successful, close PowerShell and check if the problem is resolved.

The problem with a blocked publisher can prevent you from installing or running your favorite applications, but you should be able to solve it with ease by using one of our solutions.

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