Windows 10 Pro 1909 upgrade to 2004 or 20H2 freezes at 48% 0xC1900101

bob100 · 29 Nov 2020

Hi,

I am a new member and have signed up as I am pulling my hair out trying to figure this out for the past few months.

I currently have Windows 10 Pro 1909 installed and Windows update has tried to install Windows 2004, however whilst installing on reboot it freezes at 48%. I have also tried previously to install 2004 with an ISO mounted and USB however with no luck.

Also I have tried installing Windows 20H2 both with ISO and with USB and again it just fails and freezes at 48%.

I have attached the error message I receive i have to force shutdown (once it freezes) and it rolls back any changes.

Please can anyone help

Windows 10 Pro 1909 upgrade to 2004 or 20H2 freezes at 48% 0xC1900101-windows-10-update-error.png

dalchina · 29 Nov 2020

Hi, see e.g. these which will give you some ideas and approaches to this rather typical error. The second is an identical error code and solved.

Please use the tools and approaches and advise how you get on.

Note: best to make sure you have a current disk image as something could go badly wrong if you were unlucky and your PC became unbootable as you repeatedly try to resolve this. (e.g. Macrium Reflect - free/paid + large enough external storage for image files- so often recommended here).

We couldn't install Windows 10: Error 0xC1900101 - 0x40021

Windows 10 Error code 0xc1900101-0x30018

bob100 · 29 Nov 2020

dalchina said:

Hi, see e.g.
We couldn't install Windows 10: Error 0xC1900101 - 0x40021

Windows 10 Error code 0xc1900101-0x30018

Hi, I've had a look through that previously and read a lot of articles online whom always suggest I need to remove any peripherals or anything connected to my computer. The thing is I am using a laptop and I have no other equipment attached to it.

Also all my drivers are up to date and Windows 10 Update is fully up to date and I have tried installing from clean boot but it still freezes at 48%

The error message I have suggests that a device driver has stopped responding to the setup as per the below link
https://docs.microsoft.com/en-us/win...res#0xc1900101

How do I find out which driver this is?

dalchina · 29 Nov 2020

Thank you for your reply.

Have you run
setupdiag.exe
from MS? (Google).

Have you inspected the relevant upgrade logs?

It's not necessarily about drivers being up to date- sometimes new drivers are the problem. A common misconception, unfortunately.

There is no definitive or easy way to find out.. you will see from the example threads diagnosing upgrade failures is hard and time consuming.
@zbook often deals with upgrade failures- see example tools here:
Trouble with October 2020 Update