How to disable Windows Update permanently?

 To disable the Windows Update service in Services Manager, please follow the steps below:

1. Press Windows key + R. Type services.msc, then hit Enter.
2. Search for Windows Update.
3. Right-click on Windows Update, then select Properties.
4. Under General tab, set the Startup type to Disabled.
5. Click Stop.
6. Click Apply, and then click OK.
7. Restart your computer.