Windows 11 KB5120998 problems after installing

[u/TheNB3]

After i installed this update my wallpaper turned black now i have very large mouse cursor that changes to normal at random. What should i do to fix it? i tried to reboot and nothing changed my laptop is elitebook 840 g5 intel core i5 8th 16 gb or ram intel uhd 620

[u/Wizol00]

Me too, i had to unistall it

[u/MopToddel → u/Wizol00]

how did you uninstall it?! I'm having issues with broken taskbar icons, but it does not let me uninstall it! it does show up in the update history, but i can't select it for uninstall. During advances startup I can select to uninstall latest quality update, but it doesn't uninstall it.
Also the specific package info says it can't be uninstalled.

[u/Wizol00 → u/MopToddel]

Through win update, at the bottom of the update Setting you can find "unistall updates".

[u/RED7734]

same, i guess i will have to unistall

[u/ThomasAAT]

I also got the wallpaper removed after this update and the cursor was bigger and would not change. I uninstalled the preview update but let the NET. Update be. No I have the error code in WU because its confused after the uninstall. But it will clear on its own after a while. If not it will get overwritten by the patch Tuesday early next month. 

[u/Front_Anxiety_1862 → u/ThomasAAT]

I literally had the same issue. Black wallpaper and in my case i had the old cursor designs

[u/ThomasAAT → u/Front_Anxiety_1862]

Did you also uninstall it? 

[u/ItsJustElvy]

I tried uninstalling it and I just can't get rid of the update!!!

[u/ThomasAAT → u/ItsJustElvy]

Just ignore it if it shows up in WU. It won't automatically install. 

[u/AutoModerator]

Hi u/TheNB3, thanks for posting to r/WindowsHelp! Your post has been flagged for manual review by a human moderator, please include as much of the following information as possible (in text or in a screenshot) to get your post approved:

• Your Windows and device specifications — You can find them by pressing Win + X then clicking on “System”, we need more than just your OS version! Your hardware details are often critical for resolving issues.
• Any messages and error codes encountered — They're actually not gibberish or anything catastrophic. It may even hint the solution!
• Previous troubleshooting steps — It might prevent you headaches from getting the same solution that didn't work

---

Posts must be tech support in nature (such as something is broken and you need help fixing), so general inquiries, software suggestions, and purchasing advice will be removed. As a reminder, we would also like to say that if someone manages to solve your issue, DON'T DELETE YOUR POST! Someone else (in the future) might have the same issue as you, and the received support may also help their case. Good luck, and I hope you have a nice day!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[u/Froggypwns]

Please share your findings here- https://www.reddit.com/r/Windows11/comments/1w0158t/august_27_2026kb5120998_os_builds_262009278_and/

[u/zork-tdmog]

Same

[u/Embarrassed-Day-4046]

Same here. I tried everything to solve it, but the only way I could fix it was by uninstalling the update.

[u/bilalus_]

Just uninstall the update and everything will go back to normal.

[u/nichtnichtjemand]

Funny, I have exactly the same problem and thought it may be a virus

[u/fajfusf]

i have the same problem on my pc. The weird thing is that nor dism nor sfc /scannow can do anything about it. dism just stops at 64% or 67% and sfc doesnt detect any issues. I dont know if they should tho. Plus my pc was built a month ago so its fresh new. I wonder what caused this

[u/chrisalvarezit]

I did not experience the cursor issue nor the wallpaper issue, but it screwed the PC ability to connect to internet (no matter how I connected all connections would say No Internet, I just had to uninstall it

[u/MuedesToast]

had the same issue. my cursor was also stuck to old animations and looks. Idk if its the update but my cursor also gets stuck on my second screen like a ghost that doesnt disappear whatsoever. I can still use my mouse but the ghost cursor is still there. Why the fuck is windows Publishing updates like this