HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Blocked If Blocked does not exist, create the key Inside the Blocked key, right-click on the right, select New and click String Value. Name the string {7AD84985-87B4-4a16-BE58-8B72A5B390F7} and press Enter Restart Computer Credit: https://www.windowscentral.com/how-remove-cast-device-option-context-menu-windows-10