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i tried downloading the Windows 11 Insider Preview Feature Update (26220.7934) but besides the fact that it took about 1 hour to (almost) install, it is now stuck at 99% and has been stuck for about half an hour so far,is this normal for this update or is there something wrong with my windows?
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Same here: The installation of Windows 11 Insider Preview feature update 26220.7938 rolls back to previous after 91%. I've tried everything. Updated all drivers, bios, you name it.
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So I had the exact issue and I was about to give up trying to figure it out as my machine kept rolling back after it gets to 48%. The resolution that fixed my issue is pretty simple.
I had recently reinstalled windows 11 and forgot to reinstall my drivers.
The stop code that I was getting when running the update is "Stop Code: DRIVER PNP WATCHDOG"
So after it was done rolling back the update, I checked my device manager and found that the PCI Memory Controller driver was missing.
I went to the ASUS webpage and downloaded the intel chipset driver for my computer and checked for any updated drivers and installed all of them..
The PC restarted a few times while doing the driver updates.
Once that was done, I allowed the Windows update to re-download the Windows 11 Insider Preview.
I found it interesting that it did a complete re-download after all the drivers were updated. After this new download, the update completed successfully. I am seeing Windows 11 Insider Preview Feature Update (26220.7961) was installed, and not (26220.7934).
In summary check to ensure that your drivers are all up to date and that no driver is missing when you go to your device manager. Also check that you have the latest drivers from your manufacturer and not from Microsoft. As one of the major updates I got was directly from Nvidia.
Hello Raul,
There is nothing wrong with your windows. This was not a Cumulative Update but rather a Feature update, similar to updating via ISO
There are several reports of lengthy updates. Took over an hour on my test laptop.
It also was stuck at several percentage points.
Regards
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Yeah, hmmm this 'feature' update just threw a TPM error after the reboot, and at me every time I start that I can't get rid of!!! Tried clearing TPM settings, seriously disappointed with MS windows updates in 2026, seems more risky to apply updates than to turn them off. :(
Plus it also looks it's not able to recognise my windows key, and is stating i'm on an eval copy of windows!
That is a watermark. that is normal for Insider editions.
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Twice now mine gets to 3% restarts and displays "undoing all changes"
Hi Paul,
All the Insider builds have a watermark.
That doesn't mean it's not activated.
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Unless I'm mistaken, the term "cumulative update" is not being used anymore, by Microsoft. They are supposedly using "more descriptive" terms now, and best I can tell, "feature update" is the new most common term, for the relatively big updates (monthly, for the public builds, more frequent for insiders).
BUT
The significant difference in 26220.7934 is that Microsoft decided to make this a total Windows replacement. So people need to be prepared for that more laborious evolution.
(I noticed some comments on the revived use of the watermark imply that the user interprets the watermark to mean that he's not the real owner of this OS, but that he's just evaluating a Microsoft OS. I guess such commenters need reassurance, it's still their own legitimate copy of Windows!!))
The update taking a long time near the end is common, but it should not stay stuck at 99% for that long. Treat it as a stuck Windows Update and troubleshoot it.
Try these steps in order:
If the update continues to fail after these steps, consider using the Windows Update Assistant from the official download page to manually install the latest feature update on a compatible PC.
References: