https://www.bleepingcomputer.com/news/microsoft/how-to-fix-windows-update-problems-in-windows-10/

Windows Update provides a mechanism to download and install feature and quality updates in Windows 10. While Windows Update usually works without a hitch, sometimes problems can happen, and the update process can get stuck or refuse to install a particular update.

To make matters worse, error messages displayed in Windows Update are random and rarely helpful, making it difficult to find a specific solution.