The fullscreen optimizations feature helps optimize gaming performance while games are running in full screen mode. Solution 3: Disable Fullscreen Optimizations
If Windows doesn’t find any available drivers, you can go to the official website to download the latest driver and then install it manually or try the next solution. Step 4: Restart your computer and then launch the game again to see if the error World of Warcraft was unable to start 3D acceleration disappears. Then follow the onscreen instructions to finish it. Step 3: In the pop-up window, choose Search automatically for updated driver software. Step 2: Double-click Display adapters and then right-click your graphics card and select Update driver. Then input devmgmt.msc in the box and click OK to go to Device Manager.
Step 1: Press Win + R to invoke Run window. In this case, you need to update your graphics card driver. Outdated or faulty graphics card driver could be a reason for the problem that World of Warcraft was unable to start up 3D acceleration. Read More Solution 2: Update Your Video Card Driver
