The ‘application has been blocked from accessing graphics hardware’ is a video-game related issue that occurs when specific essential files in the system are changed or lost. A lot of gamers playing games that require a graphics card generally face this issue.

There are various causes as to why this issue crops up. Sometimes, the graphics generally drivers aren’t updated, while other times, they may be misconfigured. Just as it has various causes, the ‘application has been blocked from accessing graphics hardware’ issue also has several probable solutions.

fix application has been blocked from accessing graphics hardware issue
Application has been blocked (Graphics card error) 

Fix ‘Application Has Been Blocked From Accessing Graphics Hardware’ Using These Simple Solutions

If you are an avid gamer who loves playing action games such as World of Warcraft, you might face the ‘World of War was unable to start 3D acceleration’ issue at some point in time. In such cases, it is usually the graphic card that causes the issue.

Let’s get to know the nine easiest ways to tackle this issue and get back to gaming again. You can try out these solutions one at a time and see which one solves the problem.

1. HDMI Method

If you are using a cloned TV or a monitor, the HDMI method may also work. All you have to do is remove the HDMI cable of your secondary cloned TV and run the video card on your primary monitor with the Display Port cable.

Unplugging the cloned TV eliminates the message and enables the user to play 3D games.

2. Run the System Maintenance troubleshooter

The System Maintenance troubleshooter can sometimes be an excellent remedy for the application has been blocked from accessing graphics hardware issue.

To begin with, open the Run function from the taskbar.

Then, type msdt.exe -id MaintenanceDiagnostic and click OK.

use run function to fix application has been blocked from accessing graphics
Open the Run function and run the Maintenance Diagnostic

In the dialog box that opens up, click on Next.

fix application has been blocked from accessing graphics hardware issue
Click on Next

Then, click on Try troubleshooting as an administrator.

application blocked from accessing graphics hardware
Click on Try troubleshooting as an administrator

If the issue is still not fixed, you can go for other methods in this article. Usually, running the System Maintenance troubleshooter often solves the issue. If not, it will at least let users know that the issue might be in the hardware.

3. Run the Hardware Devices Troubleshooter

You need not necessarily take significant steps, such as reinstalling drivers or making changes in the registry editor. Sometimes, this error can also be fixed by the Windows Troubleshooter.

Open the Settings app by typing ‘Settings’ in the taskbar.

Open the Settings app from the desktop search bar
Open the Settings app from the desktop search bar

Then, click on Update and Security.

Open Update & Security
Open Update & Security

Under the Troubleshoot tab, locate the Program Compatibility Troubleshooter and click on Run the troubleshooter button.

fix application has been blocked from accessing graphics hardware issue
Run the troubleshooter

Windows will troubleshoot the issue and fix it. If that doesn’t happen, you can move on to trying other solutions and see which one works for you.

4. Run the program in administrator mode

Running the program in administrator mode might not be one of the most effective solutions to apply when you face the ‘application has been blocked from accessing graphics hardware’ issue. However, it is always worth trying this method as it has been known to solve the issue for some.

Search the game you want to play in the search bar.

Once found, right-click on it and select Run as administrator. If this doesn’t work, you can turn to other solutions mentioned in this article.

Run the application in administrator mode
Run the application in administrator mode

Running any program or application in administrator mode gives the program extra privileges. The game can be blocked from running normally because of some system limitations or might consider it unsafe. However, by running them in the administrator mode, you notify the OS that the program is safe to run.

5. Tweak the compatibility settings of the game

Graphics card issues usually matter a lot when they block users from playing games. When such an issue occurs, users can tweak the compatibility settings and try to run the game. Compatibility settings are used to run a program in a lower version than the Windows 10 OS.

Just right click on the game’s EXE file and select properties.

Click on the compatibility tab.

Now, Check the option Run this program in compatibility mode. Then, select Windows 7 from the given options and click Apply.

Compatibility settings work for those applications that require fewer colors. Some older applications require fewer colors to run, which may also be why they don’t run on Windows 10.

6. Give Preference to an App

The parameters of a graphics card cannot be changed. To tackle this issue, you can always prioritize it towards a single application. In this method, the graphics card will serve the preferred app in the best manner possible.

Click on the Start button and then the gear-like symbol to open the Settings window.

Open the Settings app from the desktop search bar
Open the Settings app from the desktop search bar

Go to System and click on Display.

Select the System option
Select the System option

In the Display menu, click and open Graphic settings.

fix application has been blocked from accessing graphics hardware issue
Open the Graphics settings in the Display tab

In the ‘Choose an app to set preference’ section, choose your game or application from the drop-down menu.

Choose an app to set preference
Choose an app to set preference

Then, restart your system to see if it works. App preferences are known to provide better app performance for specific applications. In that sense, setting up your graphics card specifically for your game could do the trick and solve this issue.

7. Use the registry editor

Open the Registry Editor from the search bar
Open the Registry Editor from the search bar

The registry editor can do well to solve the ‘application has been blocked from accessing graphics hardware’ fix. To start with, type regedit in the search Cortana search bar and open the Registry Editor.

Before using the registry editor, make sure you create a safe backup of the Windows registry in your cloud or drive storage. Changes to the registry editor, be it intentional or unintentional, tend to affect your system’s stability and performance. In that case, backing up your registry and restoring it will save you from suffering through performance-related issues.

Then, navigate to the following paths one after other:

Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\GraphicsDrivers or

Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\GraphicsDrivers

registry editor to fix application has been blocked from accessing graphics hardware issue
Navigate to the given path

Now, in the space on the right pane, right-click and select QWORD (64-bit) Value. You can also choose a DWORD (32-bit) Value if you have a 32-bit platform.

Create a new QWORD file
Create a new QWORD file

Insert ‘TdrDelay’ as the QWORD or DWORD file name.

Double-click on the TdrDelay, and it will open a dialog box.

Check if the selected base is Hexadecimal. Then, enter 8 in the data value field and click OK.

registry editor to fix application has been blocked from accessing graphics hardware issue
Create and edit a QWORD file

Now, close and restart the PC and check if the changes have been made.

8. Run System File Checker and DISM commands

The application has been blocked from accessing graphics hardware’ issue may occur if you have corrupted or damaged system files on your Windows computer.

Follow these steps to recover your system files:

Type Command Prompt in the search bar below. Once you locate the Command Prompt, right-click on it and select Run as administrator. Click YES when prompted by the User Account Control.

Open Command Prompt and run it as administrator
Open Command Prompt and run it as administrator

After the Command Prompt window opens, locate C:\Windows\system32, type sfc /scannow next to it, and press Enter.

The sfc/scannow command is used to scan the protected system files and replace the corrupt files with a cached copy of the same. You can check the details of how sfc /scannow works and repairs Windows files.

Wait for the scan to be completed 100%.

run the scannow command
Run the sfc scan command

Then, type the following commands and press Enter after each command.

DISM.exe /Online /Cleanup-image /Scanhealth

DISM.exe /Online /Cleanup-image /Restorehealth

run the dism commands to fix application has been blocked from accessing graphics hardware issue
Run the DISM commands

Now, reboot the computer and start your game again to check the changes. If this method doesn’t work, move on to the next step.

9. Reinstall the Graphics Card driver

The application blocked from accessing graphics hardware is also caused when the graphics card driver gets corrupted. In such cases, reinstalling the drivers can fix the issue.

To start with, type Device Manager in the Cortana search bar and click Open.

Open the device manager from the desktop search bar
Open the device manager from the desktop search bar

After the Device Manager dialog box opens, locate and expand Display adaptors.

Locate the graphics card driver and uninstall it
Locate the graphics card driver and uninstall it

Now, right-click on the Graphics card option and select the Uninstall device.

Click on the Uninstall device option.

Uninstall the driver
Uninstall the driver

To reinstall the driver, press the Scan for hardware changes button.

fix application has been blocked from accessing graphics hardware issue
Reinstall the driver by selecting Scan for hardware changes

Reinstalling the driver is always a good practice, especially if your OS has recently been updated. An update tends to misconfigure the Graphics driver at times, which might further block some applications from running.

Conclusion

The application has been blocked from accessing graphics hardware is a common issue and can be fixed quickly, including those who aren’t computer experts. Just have to run through these solutions.

If you encounter this issue, the best way to tackle it is by starting with small fixing processes such as running in administrator mode or by changing the compatibility of the application in question. Methods like using the registry editor or running the System File Checker have a better success rate. But, they should be used as a last resort since they consume more time in contrast to other processes.