Method 1: Delete Temporary File
Step 1: Make a right-click on any empty space of the taskbar and click on the Task Manager.
Step 2: A new window will open where you have to click on the Processes tab and then look for Discord in the list of apps running on your system.
Step 3: Make a right-click and then click on End Task.
Step 4: Once the Discord app process ends, you can clean all the files associated with Discord and reboot your system.
Step 5: Launch Discord and check if the issue has been resolved.
Method 2: Modify Services Startup Type
Step 1: Press Windows + R and type services.msc followed by the Enter Key.
Step 2: A new window will open which will list all the services in your Windows OS alphabetically.
Step 3: Locate Quality Windows Audio Video Experience and make a right-click to select Properties.
Step 4: In the new window, click on the Stop button to halt this service.
Step 5: Now change the Startup type to Automatic from the drop-down menu and then click on the Start button.
Step 6: Reboot the computer and check if the issue has been resolved.
Method 3: Administrator Privileges
The next step is to check the Admin privileges of the Discord app. You can grant the admin rights to the Discord app and run it in an elevated mode. If your Discord app is in admin mode, then you can disable it once and try if this works. Here are the steps:
Step 1: Make a right-click on the Discord icon on your desktop and choose Properties.
Step 2: A small window will open where you have to click on the compatibility mode.
Step 3: Click on the checkbox labelled as Run This Program As An Administrator to enable it.
Note: If the checkbox is enabled, then you will have to disable the Admin mode and try out if it works for you.
Step 4: Click on Apply And then on OK.
Method 4: Reinstall Application
Step 1: Press Windows + S to open the Search box and type Add Remove Programs.
Step 2: Click on the result selected as the best match and a new window will open.
Step 3: A list of programs installed on your system will be displayed. Locate Discord and make a right-click to choose to uninstall.
Step 4: Let the process of uninstallation continue and then open the Run box by pressing Windows + R.
Step 5: Type %appdata% in the box followed by Enter.
Step 6: In the folder that opens, locate the Discord folder and delete it.
Step 7: Now open the Run box again and this time type %localappdata% followed by Enter.
Step 8: Delete the Discord folder and reinstall the app from the official website.