The application has been blocked for access to graphics hardware under Windows 10

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It can happen several times that programs on your Windows 10 PC are denied access to graphics hardware. This message indicates that one application has been locked for access to the graphics card. One of the most common scenarios is when your PC crashes for some reason when you play a game. This has the effect of misconfiguring the driver, and when an application attempts to access the graphics driver, it simply fails. This manual describes how to repair a locked Windows 10 application to access graphics hardware errors.

In my experience, the problem occurs when the driver is not compatible with your existing version of Windows 10 and a major update usually fails. Therefore, the GPU needs more time to respond to graphics requests and usually fails. Let us look at possible solutions.

1] Uninstalling and reinstalling the graphics card driver

This is the first thing you should try. Drivers downloaded from Windows Update are often poorly configured. The best way is to download the latest drivers from the OEM site. You must search the name of your graphics card on the website. Read our article on uninstalling and reinstalling drivers. During driver installation, make sure that you are running the program compatibility mode for Windows 10.

2] Run troubleshooting for hardware devices

Windows has an integrated tool for troubleshooting hardware devices. It is available under Settings > Update & Security > Troubleshooting. Run it, and if there is a problem the application can solve, it will. Learn more about using the Hardware Device Repair

3] Allow access to graphics hardware for applications

With Windows 10 graphics settings, you can now configure applications to use a graphics card. This works if you have a problem with some applications accessing the graphics hardware. It works equally well for WIN32 applications as for shop applications.

You will find this special option under Settings > Display > Graphic Settings. This does not improve performance, but can also save a lot of battery life. Learn more about using graphics settings in Windows 10

4] Disable TDR Checker

TDR stands for Timeout Detection and Recovery. This feature first appeared in Windows Vista and was available up to Windows 10. The system is designed to restore system graphics if the operating system does not receive a response within a certain time. The default value is 2 seconds.

The graphics card may need more time due to an intensive task, and the operating system believes there is a problem and restarts the graphics as a recovery method. The solution we proposed increases the TDR time to more than 8 seconds. This gives the operating system more time to react.

Note: If you cannot find these keys, we recommend that you create them according to the instructions on

  • Close all applications on the PC.
  • Type regedit in the search field and start it with administrator rights.
  • Select HKEY_LOCAL_MACHINESYSTEMControlSet002 ControlGraphicsDrivers or HKEY_LOCAL_MACHINESYSTEMControlSet001 ControlGraphicsDrivers, depending on what is available.

Depending on the Windows version, i.e. 32-bit or 64-bit, proceed as follows:

For 32-bit window:

  • Select DWORD value (32-bit).
  • Enter TdrDelay as your name and click Enter.
  • Double-click TdrDelay and add 8 for the value data and click OK.

For Windows 64-bit:

  • Select the QWORD value (64-bit).
  • Enter TdrDelay as your name and click Enter.
  • Double-click TdrDelay and add 8 for the value data and click OK.

Then restart your PC so that changes can be made.

The register change we made adds another 8 seconds delay to the Tdr-Checker. So if the GPU reacts in 10 seconds, it still works. You may need to change this value to see exactly what works for you.

If this still does not work, you may need to take an aggressive step and turn off the TDR completely. You can do this by changing the TdrLevel, entering the value 0 and deleting the TdrDelay key.

Restart your PC.

I hope all these suggestions will help you. If you find something that solves your problem, let us know in the comments.

RECOMMENDED: Click here to troubleshoot Windows errors and optimize system performance

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