Updating your PC to the Windows 10 May 2019 update -- a major upgrade -- isn't necessarily click-and-go. I have a bunch of laptops that I'm in the process of (slowly) updating to the May 1903 update.
This article, updated to reflect Windows 10 version 2004 (aka May 2020 Update), covers the most common scenarios you're likely to encounter when installing, reinstalling, and activating Windows 10. Is ...