What Causes the “Diablo III was unable to initialize D3D. Click OK to retry” Error?
After investigating the issue, we found the causes to be: After understanding the causes, we will now move on towards the solutions.
Solution 1: Returning Monitor Refresh Rate
If you have overclocked the Refresh Rate of your Monitor above the supported limit, this error might be triggered due to the inability of the graphics processor to run a higher rate than the one supported by the Monitor. Therefore, it is strongly recommended that you undo any changes that have been made to the Refresh Rate and return it to the normal limit. You might have used a standalone software to achieve a higher refresh rate or the GPU software that comes with the drivers.
Solution 2: Disabling Game DVR
Game DVR might be causing some compatibility issues with the game due to which certain aspects of the game might be unable to launch. Therefore, in this step, we will be disabling the Game DVR. For that:
Solution 3: Launching in 32-bit Mode
Sometimes, the game might be unable to launch in the 64-bit mode, therefore, in this step, we will be launching Diable III in the 32-bit mode. For that:
Solution 4: Running in Windowed Mode
Sometimes, running the game in “Windowed Fullscreen” mode instead of the “FullScreen” mode can eliminate the issue and launch the game normally. Therefore, in this step, we will be running the game in Windowed FullScreen mode. For that:
