Especially for Marv6's question:
Before performing the partition fix and the patch, I ran a Windows Defender quick scan followed by a checkdsk, sfc and dism. I repeated these tests after the install and these tests reported no problems. Today sfc found bad files that it could fix itself. Now I have to go look at the details of errors reported by sfc. I was also able to run a hardware diagnostic that tests the CPU, memory and circuit board features. It also didn't find any problems.
Here's only the diagnostics from running these 3 Windows tests.
C:\WINDOWS\system32>chkdsk /scan
The type of the file system is NTFS.
Volume label is Bubbles_W10.
Windows has scanned the file system and found no problems.
No further action is required.
C:\WINDOWS\system32>sfc /scannow
Beginning system scan. This process will take some time.
Beginning verification phase of system scan.
Verification 100% complete.
Windows Resource Protection found corrupt files and successfully repaired them.
For online repairs, details are included in the CBS log file located at
windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS.log. For offline
repairs, details are included in the log file provided by the /OFFLOGFILE flag.
C:\WINDOWS\system32>dism /online /cleanup-image /restorehealth
Deployment Image Servicing and Management tool
Version: 10.0.19041.3636
Image Version: 10.0.19045.3930
[==========================100.0%==========================]
The restore operation completed successfully.
Going back to the earliest days of ENIAC and more recent computers, people routinely tested a computer with known tests before running any user apps, and they re-ran the tests afterwards. If the tests failed at the start, you get to fix the computer before doing anything else. If the tests fail after the run, the results of the run are considered unreliable. While the tests I used here are often recommended by Microsoft support, they do not attempt to diagnose partition problems. It's just useful to know whether other problems exist that might interfere with installing new stuff. I run these tests on my systems several times a week.
art