Updating to 24H2 or 25H2 severely throttles browser speed on sites like Youtube.

Question

Updating to 24H2 or 25H2 severely throttles browser speed on sites like Youtube.

James Guo 0

I have been subject to automatic Windows updates since April 2025. Each time an update to 24H2 or 25H2 completes, my buffer speed in Edge and Chrome are heavily throttled on Youtube. Before the update, I could stream at 1080p with an enhanced bitrate without issue. After the update, there is stuttering even at 480p.

I have tried updating all of my drivers, clearing my browsing history/cache, DNS flush and ipconfig commands, and reinstalling the browsers. The only thing that works is restoring my computer to a version of Windows prior to the update (23H2).

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3 answers

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Answer 1

Lucus-V 13,645 Microsoft External Staff Moderator

Hi James Guo,
Welcome to Microsoft Q&A forum. I'm happy to help.

Does the issue occur on Firefox as well?

Similar issue is more likely related to Chromium and affects Chromium-based browser.

More information about this can be found at DWM Registry Values, please set the OverlayMinFPS DWORD to 0.

Disclaimer: Generally, modifying registry subkeys or work group is intended for advanced users, administrators, and IT Professionals. It can help fix some problems, however, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For further protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click How to back up and restore the registry in Windows - Microsoft Support to view the article.

Or you may access Nvidia page After updating to NVIDIA Game Ready Driver 461.09 or newer, some desktop apps may flicker or stutter when resizing the window on some PC configurations to get .reg files to modify that setting.

Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate and safe information. Watch out for ads on the site that may advertise products frequently classified as PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

I hope that above information is helpful to you.

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Lucus-V 13,645 Reputation points Microsoft External Staff Moderator

2025-12-16T07:57:51.1533333+00:00

Hi James Guo,
I hope everything is going well on your end. Just wanted to check in and see how things are going for you lately, anything you'd like to share or discuss?
Dalton V 0 Reputation points

2026-10-03T20:49:20.94+00:00

THIS IS FIXED, LAST PARAGRAPH HAS WHAT WORKED FOR ME

Hello, I have the same issue as the OP and I have no clue why this is happening. I have been reverting back to previous windows versions for the better part of 1.5 years now and now I can't do that anymore as an essential service broke on the version I was on. That service is working now on 25H2, but, as the OP states, everything is slow and buffering. I have 750+ download speeds yet I can't even run a youtube video at 480p without having it stutter.

I am on Firefox, I have scanned my windows version for faults, I have scanned the ID and that was fine, I have clean installed my graphics drivers (Nvidia 3090Ti) and that helped slightly, I have turned off hardware acceleration, I have edited flags within both Chrome and FireFox and neither fixed this issue for either browser, the DWM "OverlayMinFPS" option was not present on my registry so I couldn't try that. Please, I'm at the end of my ropes at this point.

Adding more here, this is also effecting all video streaming. Had a friend stream their screen in discord and it was a power point slide there. This is not locked to any browser but is 25H2. This issue was not present the morning before I updated and is post update. Additionally I have updated to either 24H2 or 25H2 for the past 1.5 years and each time I check these same issues (watching a random YT video or loading a webpage filled with images) and each time I get this issue I roll back to 23H2.

Another Update: I added the OverlayMinFPS and had it both enabled and disabled to no avail. I disabled MPO from Nvidia's recommendation as it can cause stuttering similar to what I'm experiencing but that did not fix this either.

Last edit in the off chance that someone is having the same issues as me: UPDATE YOUR BIOS. Fixed it for me right away. Still wild that Windows can mess something up this poorly with a single update and have 10 fixes that may or may not work.

Answer 2

Stara B 1,535 Independent Advisor

Hi, I'm Stara. Please try these steps:

Open Task Manager, go to Performance > Memory and look at the breakdown for In use, Standby and Available. This often explains where the missing memory is.
Try starting Windows with a clean boot to see if any startup program or driver is causing the high usage. More info here https://support.microsoft.com/tr-tr/topic/windows-ta-temiz-%C3%B6ny%C3%BCkleme-ger%C3%A7ekle%C5%9Ftirme-da2f9573-6eec-00ad-2f8a-a97a1807f3dd.
If you want to rule out hardware problems, you can run the Windows Memory Diagnostic:

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Answer 3

It appears that you are experiencing performance issues with your browser after updating to Windows 11 versions 24H2 or 25H2, particularly when streaming videos on platforms like YouTube. While the specific cause of the throttling you are experiencing is not detailed in the provided context, it is noted that there have been various resolved issues with Windows updates that could potentially affect application performance.

For instance, there was a mention of problems with NDI streaming performance after an August 2025 update, which caused severe stuttering and lag in streaming applications. Although this specific issue pertains to NDI, it suggests that there may be broader performance implications related to updates in these versions of Windows.

If you have already tried updating drivers, clearing browser cache, and reinstalling browsers without success, it might be beneficial to check for any additional updates or patches that Microsoft may release to address performance issues. Additionally, you can consider reporting your issue through the Feedback Hub app, as it allows users to communicate problems directly to Microsoft.

In the meantime, reverting to a previous version, as you mentioned, seems to be a temporary solution until a more permanent fix is available through updates.

References: