I can't seem to upgrade to 20H2 (and I'd rather not do a clean install until nothing else works)
I did a DISM.exe /Online /Cleanup-image /Scanhealth and /Restorehealth and /Startcomponentcleanup - no issues -- and a sfc /scannow -- which found and corrected errors. I rolled back a different Windows update and reinstalled it without any issues.
Using the Windows 10 Update Assistant made no difference (it runs about 5 minutes before giving up). I turned off my AV. No difference. I did a clean boot. No difference. I didn't see anything in the event viewer logs that stood out. The Windows Update troubleshooter found no issues.
I did a Clean up system files. No difference. Is there anywhere I can try going to 2004 first? I can't see to find that update anywhere.
I have no external devices connected to my (Dell) laptop and the BIOS is a as new as is available. I had no problems with my 12-year-old desktop.