Windows 10 internet speed capped at half the original speed on new PC

I got a new pc, the internet speed is somehow capped at 5 MB/s on every program .. Torrent, steam, chrome downloads and everything.

I tried with my laptop and other pc and it's runs all good, no internet cap there.

Tried to reinstall drivers, and updating them to the least update... didn't solve the problem.

Anyone can help me?

I was getting less than half the speed I was paying for (150Mbps instead of 400Mbps) for more than a year and had tried everything from constantly calling tech support to swapping out cables and trying other routers.

When I checked, the line “Receive Window Auto-Tuning Level” was set to disabled.

I fixed my speeds by changing that setting from Disabled to Normal using this line in CMD:

netsh int tcp set global autotuninglevel=normal

Download Speed Before Fix

Download Speed After Fix

windows 10 can improperly set the auto tuning levels.

Use Cortana to search for “CMD.”

Right-click on “Command Prompt” and click “Run as administrator.”

netsh interface tcp show global

Look for “Receive Window Auto-Tuning Level” under the results in the Command Prompt window.

If it’s set to enabled, it’s turned on, and may be causing your internet issues.

To disable it, run the following command:

netsh int tcp set global autotuninglevel=disabled

the results should be immediate, although it is recommended to restart your PC and power cycle your network gear just to be safe.

Successful command entered:

If that doesn't work for you, you can try to: Press Windows key on your keyboard, then type CMD on search, right-click on the result and choose Run as Admin. Type these following commands to reset your internet/network settings:

netsh int ip reset resetlog.txt
ipconfig /flushdns
netsh winsock reset
Restart your PC and see if the issue is resolved.

Note, both of these solutions are shots in the dark. You have left us with very little information to try and help you with this issue.

references:

https://www.onmsft.com/news/windows-10-limiting-internet-speed-heres-change

https://www.technorms.com/60413/how-to-stop-windows-10-from-limiting-your-internet

https://www.ghacks.net/2016/08/05/windows-10-limiting-internet-speed/