Fix Windows 11 upgrade failure error 0xC1900101-0x20017 on PAN workstations

draft · os-and-system windows-11upgrade-failure

Generated by docuprocessor (prompt article/v3) · 2026-04-22 15:51

Source thread

thread_id: spaces/AAAA05BdS6s/threads/W6BA2YowKE8 · 12 msgs · first 2025-02-10 · participants: Tech ATech BTech CTech D

Tech A 2025-02-10 20:54

@all Does anybody have an idea how to fix this type of error on a PAN pc when upgrading to win 11, the PAN is compatible with windows 11, but it doesnt matter how I perform the update, it will take me back with the same error message, I tried installed via iso, doing implace upgrade and using windows updates, also tried to fixed files, installed some firmware updates for the BIOS and fixed windows updates, but seems like I am having the result for Dr. Steven Lin office, any suggestion is greatly appreciated.

image/png Captura de pantalla 2025-02-04 130759.png

**Windows 11 Setup failure dialog** is displayed with the heading "We couldn't install Windows 11." Error code **0xC1900101 - 0x20017** is shown, accompanied by the message: *"The installation failed in the SAFE_OS phase with an error during BOOT operation."* A "Troubleshooting tips" link is visible at the bottom left, and the system has been rolled back to its previous state per the on-screen note.

Tech B 2025-02-10 21:59

Disable AV, usually this error is disk related or: - Check if safe boot is enabled in BIOS - Check for available space on the disk ( run cleanmgr and delete windows update files) - Run sfc /scannow, restart pc, run sfc /scannow. Make sure no corrupted files persist Instead of ISO try installation assistant https://www.microsoft.com/en-us/software-download/windows11

Tech C 2025-02-10 22:22

- does it meet the requirements? TPM ver? - did you check if the PAN machine has the Win 11 drivers?

Tech A 2025-02-11 21:08

I tried this yesterday and it didn't work for me, it kicked me out and vatech was stuck, so I have to call today and ask Dr to shut it down and turn it back on :) again we have the same boot phase error message

Tech A 2025-02-11 21:09

it does, TPM ver > 2.0 Processor Xeon W-2223 > 3.60GHz RAM > 16GB GPU > NVIDIA Quadro RTX 4000

Tech B 2025-02-12 11:54

Any USB devices connected to it? Try disconnecting them all and run troubleshooter for windows update Also you should be able to find exact log at: C:\Windows\Panther C:\$WINDOWS.~BT\Sources\Panther

Tech D 2025-02-12 15:36

From the time I worked at Microsoft and saw this boot phase errors, in rare cases, troubleshooting this error would let the update to go through, most cases ended up in a clean/custom install of the OS 🫠 not saying is the next step, but this particular error is not very promising

Tech B 2025-02-12 15:50

Jose our savior

Tech A 2025-02-12 23:01

I have everything that has been suggested but unfortunately, I am having the same result, what would be the next step?

Tech C 2025-02-12 23:04

have you checked with Vatech if the grabber card has Wn 11 drivers? if yes and it supports, then tell the doc: sorry, but this has to be done onsite

Tech C 2025-02-12 23:05

this is a basic client, so I dont think we should offer help with the USB stick and walk them thru the process of reinstalling the OS, its gonna be too much

Tech A 2025-02-12 23:07

Will do that, thanks Sergey :)

---
title: "Fix Windows 11 upgrade failure error 0xC1900101-0x20017 on PAN workstations"
category: os-and-system
tags: ["windows-11", "upgrade-failure"]
source_thread_id: "spaces/AAAA05BdS6s/threads/W6BA2YowKE8"
source_space: "spaces/AAAA05BdS6s"
generated_at: "2026-04-22T15:51:57"
participants: ["Tech A", "Tech B", "Tech C", "Tech D"]
---

# Fix Windows 11 upgrade failure error 0xC1900101-0x20017 on PAN workstations

## Problem
Windows 11 upgrade fails on PAN workstations with error code 0xC1900101-0x20017 during the SAFE_OS phase with an error during BOOT operation. The system rolls back to the previous Windows version. This occurs despite the hardware meeting Windows 11 requirements (TPM 2.0+, compatible processor, sufficient RAM) and attempting multiple upgrade methods including ISO installation, in-place upgrade, and Windows Update. The issue persists even after BIOS firmware updates and Windows file repairs.

## Resolution
1. Disable antivirus software before attempting the upgrade
2. Check BIOS settings and disable secure boot if enabled
3. Free up disk space using cleanmgr and delete Windows update files
4. Run `sfc /scannow`, restart the PC, then run `sfc /scannow` again to ensure no corrupted files remain
5. Disconnect all USB devices before running the upgrade
6. Use Microsoft's Windows 11 Installation Assistant instead of ISO files
7. Run Windows Update troubleshooter
8. Check upgrade logs at `C:\Windows\Panther` and `C:\$WINDOWS.~BT\Sources\Panther` for specific error details
9. Verify that specialized hardware (such as Vatech grabber cards) has Windows 11 driver support from the manufacturer

If these steps fail to resolve the boot phase error, a clean installation of Windows 11 may be required, which should be performed onsite due to the complexity and potential impact on imaging equipment integration.

## References
- Source discussion: `spaces/AAAA05BdS6s/threads/W6BA2YowKE8`
- Attachments: - ![Captura de pantalla 2025-02-04 130759.png](../attachments/W6BA2YowKE8.W6BA2YowKE8/Captura de pantalla 2025-02-04 130759.png) — **Windows 11 Setup failure dialog** is displayed with the heading "We couldn't install Windows 11." Error code **0xC1900101 - 0x20017** is shown, accompanied by the message: *"The installation failed in the SAFE_OS phase with an error during BOOT operation."* A "Troubleshooting tips" link is visible at the bottom left, and the system has been rolled back to its previous state per the on-screen note.

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