This install has been failing for some time now, and I find that I'm currently at 1909, which is now out of service.
Looking at the Event Viewer, I see this:
ErrorString The system cannot find the file specified.
CommandLine "C:\WINDOWS\system32\wusa.exe" Windows8-RT-KB2937636-x86 /quiet
I downloaded KB2937636, but the install failed as it's for Windows 8.
The question I have is: Why is Win 10 20H2 trying to install a Win 8 KB update?