Are you tired of the 3D Viewer app running in the background on your Windows 10 computer? Here's how you can stop it. To disable 3D Viewer, you can simply uninstall it from your system. To do this, go to the Start menu, then Settings, and select Apps. From the list of installed apps, find 3D Viewer, click on it, and then select Uninstall. This will remove 3D Viewer from your computer and prevent it from running in the future. Another option to stop 3D Viewer is by using the Task Manager. You can open the Task Manager by right-clicking on the taskbar and selecting Task Manager. In the Task Manager, go to the 'Startup' tab and look for 3D Viewer in the list of startup apps. Right-click on 3D Viewer and select 'Disable' to prevent it from launching when you start your computer. By following these simple steps, you can effectively stop 3D Viewer from running on your Windows 10 computer and improve its performance.