- If the system is undoing changes made to your computer in Windows 11, that means that the update failed.
- This problem may be caused by an error that halted the process and now, the OS is recovering.
- One of the most probable causes for this issue is a faulty or corrupted driver but there can be many other reasons.
Windows Update issues are not yesterday’s news, and they are probably here to stay for a lot longer than we would like to.
One of our readers reported that when he is trying to update Windows 11, the process gets stuck, getting the 0xc1900101 error.
Then, the PC restarts only to see the Undoing changes made to this PC message on the screen. It’s extremely frustrating because the update gets interrupted at a high percentage of completion.
We have been confronted with error 0xc1900101 on Windows 10 too and it’s usually related to corrupt or faulty drivers so it’s most likely that Windows 11 inherited this bug.
Why is the Windows 11 update service undoing the changes?
The Undoing changes made to this PC message comes as a consequence of an error during the Windows Update process.
Basically, the system cannot be finished and stops because some error appeared. That is why when the computer restarts, the system recovers to the point in time before any changes were made.
This time it was the error 0xc1900101 but any such Windows Update fault can trigger the same problem and stop the process in its tracks.
As we mentioned above, this particular error is usually produced by problematic drivers but it can have multiple reasons, from system and file corruption to drive errors or overprotective antivirus programs.
Actually, there’s a whole family of error codes related to this problem so if you encounter one of the codes below, this guide will help you fix it:
- 0xC1900101 – 0x2000c
- 0xC1900101 – 0x20004
- 0xC1900101 – 0x20017
- 0xC1900101 – 0x40017
- 0xC1900101 – 0x30018
- 0xC1900101 – 0x3000D
- 0xC1900101 – 0x4000D
Now that you know why the system is undoing changes and what can cause this problem, let’s see some possible solutions.
What can I do if the system keeps undoing changes made to my PC?
1. Update the drivers
- Click the Search button from the Taskbar, type device manager, and click the app from the results.
- Click the Display adapters section to expand it, right click on the driver, and select Update.
- Select the first option, Search automatically for drivers.
- If the system finds a new one, it will install it. If not, you can click on Search for updated drivers on Windows Update.
- You will be redirected to the Windows Update. Click on Advanced options.
- Now look at the Optional updates option. If you see that you have any new updates related to drivers there, click it and install them right away.
We have based our example on the graphics driver because it’s most likely to cause this problem but you should update all the drivers.
Of course, when it comes to important components like the graphics, you can also visit the manufacturer’s website and get the updated driver straight from the source.
We also have solutions when it comes to erorrs related to Windows 11’s outdated drivers so you might want to take a look and apply some of them if necessary.
Even more, we recommend downloading DriverFix, a dedicated tool that will keep the installed drivers up-to-date.
2. Run the Windows Update troubleshooter
- Click the Windows button and select Settings.
- Select System from the left pane, then scroll down on the right pane, and click on Troubleshoot.
- Now click on Other troubleshooters.
- Locate the Windows Update troubleshooter and hit the Run button from its right.
- The system will detect any problems with the update and attempt to fix them. Try performing the update again and see if this time works.
3. Check for Windows updates
- Click the Start button and select Settings.
- Then click on Windows Update from the left pane and hit the Check for updates button from the right.
- If there are any new updates, the system will start downloading and installing them.
Even though the update is exactly the procedure you are not able to perform, there might also be other system updates that you have missed, and installing them before the problematic one may solve this issue.
4. Disable or remove your antivirus
- Click the Search button from the Taskbar, type security, and select Windows Security from the results.
- Choose Virus & threat protection.
- In the next window click on Manage settings.
- Now turn off the real time protection.
We have shown you how to turn off the Windows Defender Antivirus but if you have a third-party antivirus installed, you need to turn it off from its settings.
If that doesn’t work, uninstall your antivirus temporarily because it may block your updates. You can always reinstall it afterward.
In the case you discover that that software was causing the problem, think about getting a better antivirus for Windows 11.
5. Disconnect all unnecessary peripherals
- Click the arrow from the Notifications tab, then click the USB icon.
- Identify the USB peripherals from the list and eject them.
- It’s now safe to physically unplug them from your PC.
Disconnect all peripherals you don’t need (printer, external drive or USB stick, etc.) before updating the system. Don’t forget to eject the USB devices from Windows before unplugging them.
If we’re at the peripherals subject, you might be interested in how to make a bootable USB drive for Windows 11. It will be very useful for further debugging.
6. Run a SFC scan
- Click the Search icon on the Taskbar, type cmd, then click on Run as administrator to start Command Prompt with full privileges.
- Type or paste the following command and press Enter to run it:
- System File Checker will look for any corrupt system files and attemp to fix them. Wait for the process to finish, then restart your PC.
7. Scan your hard drive for errors
- Select the Search button from the Taskbar, type command prompt, and click on Run as administrator to start Command Prompt with administrative rights.
- Type or paste the following command and press Enter to run it:
Dism /Online /Cleanup-Image /RestoreHealth
- Wait until the process has finished, then restart your system.
8. Reset your PC
However, the reset process allows you to keep your files but you will lose all installed programs so make sure you still have the software to restore them.
- Choose the Start button located on the Taskbar and click on Settings.
- Now select System and click on Recovery from the right pane.
- Next, hit the Reset PC button.
- Click on Keep my files if you don’t want to lose them or select the second option if you want a fresh start. We also recommend performing a backup before going through with this step.
- Select the first option, Cloud download to get Windows 11 online (you need at least 4 GB of free space on your drive). If you have a local kit, you can go for the second option.
- Click Next, then Reset, and Windows 11 will start the reinstallation process.
If the procedure is not successful, read our guide on what to do if the Reset PC is not working in Windows 11 and solve it right away.
We hope that our solutions helped you fix this update problem and you managed to get rid of the Undoing changes made to this PC message on the screen.
We also have an article that solves the problem of undoing changes in Windows 10 and some of the solutions work for Windows 11 too so it might be helpful.
You should also check if your PC has enough space on your drive for the update because this update error might also be caused by low disk space.
It would be helpful to check our article on how to make Windows 11 faster and more responsive and you will also learn how to free some space on your drive.
Let us know the method you opted for in the comments section below.