Windows 10: Internet connection slows down after several hours...

About two updates ago, I noticed my internet Ethernet connection, using WOW 500/50 plan, slows down to less than 20 Mbps after several hours. I am confirming this through various speed test services. Naturally, I had WOW come out and after going through multiple tests, they determined that I was getting the speed I was supposed to get, all the way up until my computer. Even my WiFi 5G was pulling over 300 - 350 down, yet my ethernet connection was in the teens. We even tried a different cable modem, but the issues continued.


After searching for answers, I came across a user that had something similar, and his resolution was to disconnect the ethernet adapter, reboot and it should go back to normal speeds after it re-installs the adapter on start up. Tried it, hey it works!! speeds stayed stable for a couple of days, and then started to decline once again. I noticed that I can temper this issue slightly by running a script to disable the ethernet adapter, then re-enable it:

Code:

@echo off


:: BatchGotAdmin

:-------------------------------------

REM  --> Check for permissions

>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"


REM --> If error flag set, we do not have admin.

if '%errorlevel%' NEQ '0' (

    echo Requesting administrative privileges...

    goto UACPrompt

) else ( goto gotAdmin )


:UACPrompt

    echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"

    set params = %*:"=""

    echo UAC.ShellExecute "cmd.exe", "/c %~s0 %params%", "", "runas", 1 >> "%temp%\getadmin.vbs"


    "%temp%\getadmin.vbs"

    del "%temp%\getadmin.vbs"

    exit /B


:gotAdmin

    pushd "%CD%"

    CD /D "%~dp0"

:--------------------------------------

:: Disables the Ethernet adapter

netsh interface set interface "Ethernet" admin=disable

:: Enables the Ethernet adapter

netsh interface set interface "Ethernet" admin=enable

:: Confirms adapter is enabled

netsh interface show interface

Doing a speed test immediately afterward confirms speeds are back up to over 500 mbps. (I should note that my upload speeds are never affected - only the download speed). The bad news is that this only lasts for about 4-6 hours or so. Does anyone have any ideas on how to permanently solve this problem?

I'm currently on Windows 10 Pro 1903 Build 18362.356

:)

 

WIN10 internet SLOW!!!!!!!

Hello William,

We realize the inconvenience you are experiencing with slow Internet Connection. We will certainly help you.

• Have you installed all pending Windows updates?
• Have you tried connecting to some other Internet connection and check if the same issue occurs?

We suggest you to connect your system to some other network and check if the same slow Internet connection issue persists. If no then there must be issue with your Internet connection.

Further you can try performing the steps from the link below and check if it helps:

Fix network connection issues

Let us know the status of the issue. We will be happy to assist you further.

Thank you.

 

Slow Internet connection

Hi,



Thank you for writing to Microsoft Community Forums.



We understand the difficulties that you are facing with internet lag in your laptop and in order to get clarity and to assist you accordingly, please reply with the answers to the questions below.

• What is the make and model of the laptop?
• What is the Windows 10 version and Build installed? (Type winver in Windows search/Run command)
• What type of internet connection are you using (wired/wireless)?
• Are you facing lag issue with any other device like a smart phone or a different laptop to the same network?
• Do you face the same issue connecting the Laptop to a different network?
• Did you try connecting the laptop using an Ethernet cable?

We would suggest you to refer this article: Why is my Internet
connection so slow?



Note: This article is for Windows 7,but it holds good for Windows 10



We await your response.



Aditya Roy

Microsoft Community – Moderator

 

Slow internet connection from Wifi - Network adaptor

Hi Maegen,

Slow internet connection could be due to outdated network adapter driver or Wi-Fi signal interruptions.

We would like to know some additional information to better isolate the issue:

• Have you tried updating your network adapter driver?
• Do you have any anti-virus or 3rd party security app running?
• Is your computer updating Windows or other programs?
• Have you done any changes on your computer prior to the issue?

In the meantime, we suggest that you try to run Network Adapter troubleshooter and
Internet Connection troubleshooter. It will find and fix problems with wireless network adapters and Internet connections. Follow the steps provided below:

• Press Windows key + X and select Settings.
• Click Update & Security, then choose Troubleshoot.
• Click Internet Connections and Network Adapter.
• Click Run the troubleshooter.

We will wait for your response.