Windows 11 is limiting my internet speeds

@mstrflsh and Lester

The problem is the issue keeps returning. Having tested this to destruction on my win11 system it occurs every time I open a Teams and Zoom client - probably others. (Did not happen on Win10).

You can simply open Task Manager, and delete the Teams or Zoom processes and watch the internet speed return.

I raised this with Teams support - they shrugged shoulders and requested I open a ticket with the Windows team because it is not just a Teams issue :-(

I have stopped using Teams and Zoom clients - I will wait until the Windows team fixes it or I get a new system.

Martin

This is for Lester BernardReyes, hoping you'll get this message - I HAD a problem with my internet upload speeds, my Spectrum downloads run about 550 and normal upload is around 21. However on one computer, I only had upload speeds of 2 to 4. I found you answered that question back in 2021 with almost the exact same set of instructions as given here. The first time I did just the WWAN step, turned it off and turned it on, and it fixed the upload. 2 days later it was down to under 1 - download was still 550+. So I tried again, no change. So I followed the second set of instructions (netsh and ipconfig). NOW, INSTEAD OF 550+ DOWNLOAD, I HAVE ONLY 70 DOWNLOAD. Upload continues in the 4 to 6 range. WHAT HAPPENED?? How do I get my original settings back to download at 550+ ????

Hey Robert, I had the same problem as you. After following the second set of steps, my download speeds shot down. To fix it, you can follow the steps here to see the explanations https://pureinfotech.com/disable-window-auto-tuning-fix-slow-internet-speeds-windows-10/ , or just type this into admin cmd, "netsh int tcp set global autotuninglevel=normal". Hope this helps.

Thank you so much for sharing this, this genuinely solved an issue that's been going on for weeks!

Boi

I found it was Microsoft Teams client that was affecting my PC after Win 11 upgrade.

I happened to notice after many network resets and reboots that only Teams was running, so I killed all related processes and the internet speed returned.

When I ran Teams client again the speed reduced to 7-8 MBPS. In the end I removed the app after several tests to check it was this. Note: never happened in Win10.

Some clients like Teams - so have to use the Browser version. It is a shame as cannot auto set up in Outlook.

If you find the magic switch in Win 11 that is doing this let me know.

Martin

netsh int tcp set global autotuninglevel=normal fixes this. see here https://pureinfotech.com/disable-window-auto-tuning-fix-slow-internet-speeds-windows-10/ 

OK, I was banging my head against the wall trying to figure this issue out for days. None of the other suggestions made any difference. Whats worse is only 1 Windows 11 device on my network had the issue and if I took that device to another network, it ran just fine. Turns out my auto tuning level was disabled and setting it to normal, as suggested, resolved the issue immediately. No reconnects or reboots required.

I had a similar issue with an Alienware computer and it ended up being the Killer Network Software which is some sort of network optimizer. When I killed that service my speeds went back to normal. I am not sure if this will help either, as I see this thread has been through some stuff.