Windows update error: 0xc1900101.

Vanguard · June 16, 2021

Hi.

So I have had problems updating Windows since the 2004 version, and still can't update to 20H2.

Update history says the error was 0xc1900101.

The PC will install the update, then reboot, then reboot again immediately upon reaching the Windows loading screen, and then revert back to 1909.

Even when I download Windows using the Windows Media Creation Tool, and then try to boot from the USB drive, I'm having an issue.

I get 2 options to boot from USB. One starts with UEFI, and the other starts with USB.

When I choose the USB option, I can get to the installation screen, but can't install Windows.

When I choose the UEFI option, I get to a weird looking screen, with the Windows logo "messed up" (see attached picture). It will sit like that for a little while, and then reboot.

A while back, when I tried to install the 2004 update, the pc failed to revert back to 1909, and the only reason I was able to get a functioning pc again was that I had an old Windows 18XX installation USB drive. So, it seem there's something in the 2004 and 20H2 update, that my PC doesn't like.

Do I need a BIOS update perhaps? I'd really prefer not to update the BIOS. I have the ASRock Fatal1ty AB350 motherboard, with bios version 4.50.