How to fix error 0xc1900101 on windows 11 upgrade.

Question

How to fix error 0xc1900101 on windows 11 upgrade.

RiruRaru 0

I have been trying to upgrade to windows 11 from 10 and I keep getting error 0xc1900101. While updating before it reverts the changes it show Stop Code: KMODE_EXCEPTION_NOT_HANDLED (0x1E). I have updated to the latest bios, tried to update drivers, unplugged devices, checked for corrupted files but nothing worked. Here is the log file if it is any help: setuperr.log.

Specs:

Asus TUF B650 PLUS

RX 7900 XTX

Ryzen 7 7800X3D

WD Blue SN570 (Boot drive)

MSI M461.

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2 answers

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Answer 1

DaveM121 872.6K Independent Advisor

1

I cannot find the exact cause of the update failure in the log you provided, but most likely it is caused by a driver.

What method are you using to perform the upgrade to Windows 11?

2

Click your Start Button, then just type msinfo and press Enter, please provide a screenshot of the resulting System Information window.

RiruRaru 0 Reputation points

2026-05-05T14:14:38.67+00:00

I have tried the windows update and also the windows installation assistant. I would try with an ISO but I cannot find my USB drive so I might have to go buy a new one.

Here is the system info:
DaveM121 872.6K Reputation points Independent Advisor

2026-05-05T14:19:09.47+00:00

Thank you for that information.

The most successful method to upgrade to Windows 11 is to use the Windows 11 ISO.

You do not need a USB to use the ISO to perform the upgrade, you can download the ISO directly to your C drive.

Please ensure you download the ISO in the same language as you use for the Windows UI, follow the steps, this is then not like re-installing Windows, it is just like an update and your personal files, settings and installed software will not be affected.

You will need at least 40Gb of free space on your C drive for the upgrade.

Click this link:

https://www.microsoft.com/software-download/windows11

to download the Windows 11 ISO

When the ISO file completes downloading

Disconnect from the Internet

Disconnect all external devices with the exception of a mouse or keyboard.

Temporarily disable any 3rd party Anti-virus you may have installed

Then, in Windows File Explorer, double click the ISO and then run Setup.exe and select the Install option.

Very Important - ensure you select the option to keep your files and apps.
RiruRaru 0 Reputation points

2026-05-05T15:44:24.49+00:00

I tried now with ISO and nothing changed. It failed the exact same way as before and I got this message once I got back to windows
DaveM121 872.6K Reputation points Independent Advisor

2026-05-05T15:52:37.9833333+00:00

1

What method do you use to update/install all your drivers.

2

Do you have any 3rd party anti-virus or VPN installed on your PC?
RiruRaru 0 Reputation points

2026-05-05T15:57:29.32+00:00

I updates drivers from manufacturers websites and windows update and I don't have any antivirus or vpn.
DaveM121 872.6K Reputation points Independent Advisor

2026-05-05T16:01:20.19+00:00

In that case, the best option to rule out system corruption in the Windows 10 installation would be to perform this process, then try running the Windows 11 ISO again to perform the upgrade.

Click your Start Button, then just type cmd

From the resulting list, right click Command Prompt and choose 'Run as Administrator'

Paste this command into Command Prompt and hit Enter:

sfc /scannow

When that completes, paste this command and hit Enter:

dism /online /cleanup-image /restorehealth

That command will take time to complete, when it does, close Command Prompt and restart your PC
RiruRaru 0 Reputation points

2026-05-05T17:24:38.1266667+00:00

Doesnt work either.
DaveM121 872.6K Reputation points Independent Advisor

2026-05-06T05:16:36.8366667+00:00

Sorry, I was offline.

In that case, the only solution may be to backup your files, then create a bootable Windows 11 USB and use that to clean install Windows 11.

Answer 2

Error 0xC1900101 during a Windows 11 upgrade is a driver-related upgrade failure. The KMODE_EXCEPTION_NOT_HANDLED stop code further supports that a faulty or incompatible driver or low-level software is causing the rollback.

Follow these steps in order (some may already have been tried, but they are the supported sequence for 0xC1900101):

Ensure enough free disk space

Confirm at least 20 GB of free space on the system drive (for 64-bit Windows). If needed, remove temporary files or apps and use the built-in tools to free space. For details, see Free up drive space in Windows.

Run Windows Update repeatedly

Open Settings → Windows Update.
Install all available updates (including optional driver/firmware updates).
Restart when prompted and repeat until no further updates are offered.
If Windows Update itself shows errors, run the Windows Update Troubleshooter to repair update components.

Update or remove third‑party drivers

Visit the hardware vendors’ sites (Asus, AMD, WD, MSI) and install the latest Windows 10/11 compatible drivers for chipset, storage (SATA/NVMe), graphics, and network.
Pay special attention to storage and chipset drivers, as these commonly cause 0xC1900101.

Unplug nonessential hardware

Physically disconnect all nonessential devices: external drives, USB hubs, printers, extra controllers, docks, etc.
Leave only keyboard, mouse, and display connected during the upgrade.

Check Device Manager for driver problems

In the taskbar search box, type device manager and open Device Manager.
Expand each category and look for devices with a yellow exclamation mark.
For each problematic device, right‑click and choose Update driver or Uninstall (then restart). Removing or updating these drivers can resolve 0xC1900101.

Remove third‑party security software

Uninstall any non‑Microsoft antivirus, antispyware, or security suites.
Restart after uninstalling.
Windows Defender (Windows Security) will protect the system during the upgrade.

Repair disk errors

In the taskbar search box, type command prompt.
Right‑click Command Prompt and run as administrator.
Run:
```
  chkdsk /f C:
```
Approve running at next restart if prompted, then restart and let the disk check complete.

Perform a clean boot

Configure a clean boot so that only essential Microsoft services and drivers load. This reduces conflicts from background apps and services that can cause setup failures.
After setting up the clean boot, restart and run the Windows 11 upgrade again. See How to perform a clean boot in Windows for exact steps.

Repair system files and Windows image

Open an elevated Command Prompt again.

Run the DISM repair command:

  DISM.exe /Online /Cleanup-image /Restorehealth

After it completes, restart and retry the upgrade.

If the upgrade continues to fail with 0xC1900101 after all of the above, analyze the detailed setup logs as described in Resolve Windows upgrade errors to identify the specific driver or component causing the KMODE exception, then remove or update that component before attempting the upgrade again.

References:

Get help with Windows upgrade and installation errors

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