Windows 11 KB5077181: Microsoft claims stability, my Lenovo LOQ proves otherwise

[Redaktion]

Windows 11 KB5077181 (OS Builds 26100.7840/26200.7840) shipped on Feb. 10, 2026. On a Lenovo LOQ test system, KB5077181 installed Feb. 11 (Build 26200.7840) and was followed by Wi-Fi instability, Bluetooth disconnects, stutter, and slow shutdowns.

https://www.notebookcheck.net/Windows-11-KB5077181-Microsoft-claims-stability-my-Lenovo-LOQ-proves-otherwise.1230119.0.html

[JojoFR]

I guess everything went back to normal once you uninstalled the update? 

I personally uninstalled it from my cloud-gaming instance (ShadowPC), as even ShadowPC sent an email to its customers saying this KB (KB5077181, but also KB5075941 if you're on the 23H2 branch) could make the system unreachable.

[Darryl Linington]

Hi there! At the moment, I'm running the latest update. I won't be rolling back or uninstalling so I can keep an eye on this :)

[NYopp]

Is anyone else having issues in regards to this KB patch with their C drive reporting that its abnormally full?

[Davidm86]

My Lenovo Yoga 9i with identical specs is having the same issues , also my fans run a lot more

[Darryl Linington]

My Lenovo Yoga 9i with identical specs is having the same issues , also my fans run a lot more

Pretty much the same my side. Additionally, as I mentioned, super slow shutdown. I have an old Gigabyte laying around... Would love to see if it boots up and shuts down faster than the LOQ... Without updates on the Gigabyte installed.

[dumb_oems]

Looks like some vibe coding in Microsoft broke their stuff. Quality control is super low there, it is all vibes these days. With all the Windows bullshit, I am surprised more people haven't transitioned.

I don't know why people still bother with Windows, when there's MacOS - Apple has both superior software and hardware these days, at competitive prices especially for basic configurations - and next month even the very low end will be dominated by them.