From https://www.drivereasy.com/knowledge/windows-update-stuck-at-0kb-solved/
0. Turn off AV
1. Press Win+R (Windows logo key and R key) at the same time. A Run dialog box will open.
2. Type msconfig in the run box and click on OK button.
3. Click the Services tab and check the box next to Hide all Microsoft services.
4. Click Disable all button and click OK button.
5. Restart your PC for the changes to take effect.
6. Launch Windows Update and download the updates again.
Tip: After downloading the updates, open System Configuration dialog box and enable all disabled services.
Uncheck the box next to Hide all Microsoft services and click Enable all button. Then click OK button.