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How to fix slow internet speed on Windows 10

Windows 10 updates often change settings that they should not. These changes are hard to predict and often they aren’t discovered for a long time. By then, the update isn’t considered to be the cause behind the change and users look elsewhere for a fix.

One unfortunate bug that appears to be recurring for a lot of users after a major Windows 10 update is slow internet speed. This problem may be simple to solve if it began right after an update.

Fix slow internet speed on Windows 10

Go through the following steps to fix the slow internet speed problem on Windows 10.

  1. Open Command Prompt with admin rights.
  2. Run the following command.
netsh interface tcp show global
  1. Check the value returned for Receive Window Auto-Tuning Level. If it says ‘normal’ we will be disabling it, and if it’s disabled, we will be enabling it.
  2. To enable Receive Window Auto-Tuning Level, run the following command.
netsh int tcp set global autotuninglevel=normal
  1. To disable it, run the following command.
netsh int tcp set global autotuninglevel=disabled
  1. Check if your internet speed is back to normal and if it’s consistent after changing the state of Receive Window Auto-Tuning Level.

Other solutions

The Receive Window Auto-Tuning Level solution is a common fix for slow internet after a Windows 10 update. The update changes the state of state Receive Window Auto-Tuning Level. It’s logical to assume that its state before the update was what worked best on your system which is why we have to change it back. If it doesn’t help, you should reset it back to what it was and try other solutions. The first place to start is with your network adapter. Try resetting it. We have a detailed post on how to reset the network adapter on Windows 10.

You should also get in touch with your ISP and ask them if there are any specific settings that you can change on your system or your router to get a more stable connection speed. 


Slow internet is hard to work with and the internet connection, as well as a Windows 10 system’s ability to connect to a network, are often casualties of major and minor Windows 10 updates. More often than not, rolling back the problematic update will fix the problem but this setting may not be returned to its previous state after the rollback. It is always worth checking. There’s no set rule on whether or not Receive Window Auto-Tuning Level should be enabled or not. It depends on your system’s configuration.

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