So as the thread title says, I cannot get my computer to update to Win 10 20H2 from version 1909 which I believe was the last successful update. I have tried 6 times to update and each time after several HOURS of what appears to be updating it reverts to uninstalling the update.
I tried disabling Defender but that didn't help. I ran SFC which found and repaired several corrupt files, still won't update and leaves this alert: Last failed install attempt on 5/7/2021 - 0xc1900101
At the same time, it is trying to install an update for Microsoft Office 2010 (KB2986257) 32-bit edition (158) that also fails each time leaving this alert: Last failed install attempt on 5/20/2021 - 0x80070643. I totally don't understand that because this is a 64-bit machine and the only Office 10 I can think of is a starter version that came with the computer. I currently have a 365 subscription on this machine.
I have no idea if these failures are related somehow, hence I'm reaching out for help to update to the latest version of Windows.