Windows won't upgrade with error 0xc1900101

Question

Windows won't upgrade with error 0xc1900101

nothing to see here 0

So i was upgrading my windows to build 29558 but i can't like every single times. I tried many solutions like dism, sfc or even deleting $WINDOWS~BT but it didn't work, here's some logs i will provide:
[Moderator Note: Personal Info Removed] (setupact.log)
[Moderator Note: Personal Info Removed] (setuperr.log)

Neil D 32,740 Reputation points Volunteer Moderator

2026-04-09T19:16:18.6533333+00:00

I would suggest you check and post here for Insider preview help.

Windows Insider Program

1 answer

Your answer

Neil D 32,740 Reputation points Volunteer Moderator

2026-04-09T19:16:18.6533333+00:00

I would suggest you check and post here for Insider preview help.

Windows Insider Program

Answer 1

Clary-N 10,730 Microsoft External Staff Moderator

Hi nothing to see here,

Thanks for sharing the details and taking the time to gather the logs.

At the moment, I’m unable to access the log files from the links you previously shared. Could you please upload the log files directly via Private Message instead? This will allow me to review them properly and avoid any access issues.

Once I’m able to check the logs, I can look for any entries related to driver compatibility or rollback behavior, which are common causes behind upgrade error 0xC1900101, and then advise on the next steps.

Thank you for your cooperation and I look forward to your update.

If you have additional questions about this answer, please click "Comment".

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Clary-N 10,730 Reputation points Microsoft External Staff Moderator

2026-04-07T10:01:18.06+00:00

Hi nothing to see here,,

Thank you for sharing the log file.

The log shows multiple migration and setup-related errors, which are commonly associated with upgrade failures such as 0xC1900101. Although no single driver is explicitly identified, this pattern often points to driver incompatibilities, leftover system configurations, or third‑party software interfering with the upgrade process.

To help minimize these issues, please try the steps below before attempting the upgrade again:

1. Update device drivers

Ensure all critical drivers, especially storage, chipset, display, and network, are fully up to date. These should be downloaded and installed directly from the device or system manufacturer’s support website.

2. Remove third‑party system software

Temporarily uninstall any third‑party antivirus, encryption tools, VPNs, or system utilities, as these can prevent required file and registry changes during the upgrade.

3. Disconnect non‑essential hardware

Unplug external devices such as USB drives, docking stations, printers, or external monitors to reduce the chance of hardware or driver conflicts.

4. Perform an in‑place upgrade using installation media

Download the Windows Media Creation Tool then run setup.exe from within Windows. When prompted, choose the option to keep personal files and apps. This type of in‑place upgrade reinstalls Windows system files while preserving data and applications and is often more successful when standard upgrade attempts fail.

*Disclaimer: Let’s try performing an in-place install or in-place upgrade which will refresh your Windows files and operating system without removing files or applications. That being said, we always recommend that if you have important data, you should back it up before making large system changes. If you want to back up your data first, please do so.

If the upgrade still fails after completing these steps, providing the full setup logs, including setupact.log in addition to setuperr.log, would allow for more detailed analysis. Kindly send it via Private Message.

Please let me know how it goes, and feel free to reach out if you need any assistance with the steps above.
Clary-N 10,730 Reputation points Microsoft External Staff Moderator

2026-04-08T09:02:57.2666667+00:00

Hi nothing to see here,

I'm still unable to view the link you send unfortunately. May I know if you have a chance to try all the above suggestions include the in-place upgrade yet?
Kindly help reply here in the comment section and use the Private Message for the file sharing only.
Clary-N 10,730 Reputation points Microsoft External Staff Moderator

2026-04-09T08:40:48.6966667+00:00

Hi nothing to see here,

May I know if you have got any chance to check my above answer?

The backup link you sent via PM is still not working at my end.

Please keep me updated here instead.
nothing to see here 0 Reputation points

2026-04-09T14:01:30.2133333+00:00

@Clary-N have you try opening the log file in a local editor? (i tested with vpn and incognito mode and i was able to download the file), and i tried every single steps you provided but it didn't work
Clary-N 10,730 Reputation points Microsoft External Staff Moderator

2026-04-10T01:01:40.26+00:00

Hi nothing to see here,

It might be worth trying the upgrade in a Clean Boot state, as sometimes background apps or services can interfere with major Windows updates. To do this, press Windows + R, type msconfig, and press Enter. From there, go to the Services tab, check Hide all Microsoft services, then click Disable all. Next, go to the Startup tab, select Open Task Manager, disable all startup items, and restart your device.

*Disclaimer: A "clean boot" starts Windows with a minimal set of drivers and startup programs. It helps to determine whether a background service is interfering with your game or program and to isolate the cause of a problem.

These steps of "clean boot" might look complicated at first glance. However, to avoid any trouble for you, please follow them in order and step-by-step so that it will help you get back on track.

Once you're back in Windows, please also check for any driver issues in Device Manager by pressing Windows + X and selecting Device Manager. Look for any devices showing a yellow exclamation mark, as this may indicate a driver error. If you see one, right‑click the affected device and choose Update driver. After that, try the upgrade again.

Regarding the setuperr.log, since the share link is not working as expected, please help send the last 30–50 lines around the failure from the log file via Private Message so we can take a closer look.

Looking forward to your update.
Clary-N 10,730 Reputation points Microsoft External Staff Moderator

2026-04-11T05:40:28.2933333+00:00
Hi nothing to see here,

Thank you for sharing this portion of the setupact.log.

From what we can see in the snippet, the upgrade progresses through the SafeOS and offline servicing phase successfully and reaches the OOBE Boot phase (~71%) before rolling back. At that point, the following entry is recorded: WINDEPLOY error code is 0xC0000374

This may indicate that the upgrade encountered a memory heap corruption condition during the deployment phase. In some cases, this can be related to:

Third‑party services or security software interfering during first boot, or

Existing system component inconsistencies that only surface during the OOBE migration stage

Since the rollback happens after the OS image is already applied, this suggests the issue may not be related to disk space or download problems, but rather during system initialization on first boot.

In addition to the Clean Boot steps previously suggested, we recommend trying the following before attempting the upgrade again:

1. Temporarily uninstall any third‑party antivirus or endpoint protection software

Even when disabled, security software can still load drivers or services during the upgrade process. Please fully uninstall it for now (you can reinstall it after the upgrade completes).

2. Repair the current Windows image

Open Command Prompt as Administrator, then run the following commands one at a time:

DISM /Online /Cleanup-Image /RestoreHealth sfc /scannow

Restart the device after both commands complete.

3. Disconnect all non‑essential external devices

Please disconnect any external peripherals such as:

USB drives

Docking stations

External monitors

Bluetooth adapters

Printers

Then try the upgrade again with only the keyboard and mouse connected.

Please also let me know how the upgrade goes when performed in a Clean Boot state.

If it rolls back again, kindly share the relevant setuperr.log entries, specifically the last 30–50 lines captured around the time of failure via Private Message so we can take a closer look at what may be triggering the rollback.
nothing to see here 0 Reputation points

2026-04-11T23:13:48.4933333+00:00

i tried repair-install and it worked
Clary-N 10,730 Reputation points Microsoft External Staff Moderator

2026-04-14T00:34:02.7866667+00:00

Hi nothing to see here,That’s great to hear. Glad the repair install did the trick.

If you think my reply is helpful to you, please click "Accept Answer" and kindly upvote it. This helps others in the community facing similar problems.

Thanks for your understanding.

Have a great day!

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Windows won't upgrade with error 0xc1900101

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