Hello
Try this:
1) Clear everything in the Windows 10 update cache files >> C:\Windows\Software Distribution\ folder
Here are details how to do it >> https://blogs.technet.microsoft.com/mckittrick/windows-update-issues-clear-windows-update-cache/
2) Ensure your PC is connected to the Internet. Run a CMD prompt as administrator and use DISM to repair components of Windows
DISM.exe /Online /Cleanup-image /Restorehealth
Here are details - OPTION ONE - Step 5. >>> https://www.tenforums.com/tutorials/7808-use-dism-repair-windows-10-image.html
3) Try Window update troubleshooter - an automated tool which may fix most issues on its own >> https://aka.ms/wudiag
Let me know how it goes