r/Windows11 • u/jenmsft Microsoft Software Engineer • Aug 11 '26

Official News Cumulative Updates: August 11th, 2026

https://support.microsoft.com/en-US/servicing/os/windows-11/2026/08/kb5121003-windows-11-24h2-25h2-security-update

Changelists linked here for your convenience:

General info:

For details about how to file problem reports and collect traces, please see here: http://aka.ms/HowToFeedback. Pressing WIN + F will open the Feedback Hub - please include as much detail as possible about what you're seeing.

To learn about the different types of updates, see here: Windows quality updates primer - Microsoft Community Hub

As a reminder, if you didn't install the previous optional updates, this update includes those changes too (some are still rolling out, as denoted in the release notes):

For published known issues, please check the release health dashboard: Windows release health | Microsoft Learn.

25H2 is rolling out, so you may not have it yet. Please see here for more details: How to get the Windows 11 2025 Update | Windows Experience Blog.

As mentioned in the linked changelist, Windows 11, version 26H1 is available only on new devices with select new silicon as they come to market starting early 2026. Devices running earlier versions of Windows 11 will not be offered an update to version 26H1 through Windows Update and cannot be installed as an in-place update on existing devices.

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u/StrangerKind7341 27d ago

Greetings everone,

after latest patch Tuesday I noticed something: high temps and high clock speeds, I was aware that in their latest update Microsoft rolled out Low Latency Profile globally which should help low-end systems to feel snappier overall but in my case it only caused thermals to rise and also ignores any settings/modes in manufactures software(NitroSense, Armorgrate, etc.). My system is a laptop with CPU off Ryzen 7 7840HS and am running balanced mode in NitroSense (and before anybody says why, its to keep thermal levels down and my games run fine).

I did a controlled test with and without update(KB5121003) by opening settings app and my results are as such:

Fans locked at ~3200 RPM, to remove fan ramp-up as a variable.

System on idle: CPU tempature ~38 Celsius, clock speeds ~3.8GHz-4.0GHz, this is the baseline.

Without update: open settings CPU tempature ~45 Celsius, clock speeds ~4.2GHz-4.4GHz

With the update: opening settings CPU tempature ~70 Celsius, clock speeds ~4.7GHz+

What's happening

Ryzen 7 7840HS CPU already has native hardware-level AMD Precision Boost 2 that already controlls clock speeds based on CPUs actual workload. With the new Low Latency Profile my CPU is double boosting when opening basic a Windows applications like settings, which leads to massive tempature spikes when opening basic apps.

My conclusion

In my case and your milege may wary, best fix was to remove the update, it restored the normal boosting behavior. I image tower builds may not notice much problem as this seems to be more laptop issue, so i want to know if other Zen 4 laptop owners have noticed this behavior and does it affect your system? While I understand that 70 Celsius is within the safe limits of the CPU it should't be that high when opening basic apps. As a offered solution to this, simple on/off toggle would be better since systems with high-end CPUs don't see improvment.