8 Proven Ways to Fix Slow LAN Speed on Windows 11

Fix 1. Check Your Internet Connection

The first thing you should do is to check if your internet works fine on other devices. If it still doesn’t work, then it indicates that you need to optimize your internet connection. Here you can refer to the following tips:

  • Use a wired connection. A wired connection provides you with a faster and more stable internet connection than wireless connections.
  • Limit the number of active connections on your network. If your internet is shared among multiple users at the same time, then you may not get enough bandwidth.

Fix 2. Switch to a Different DNS Server

Sometimes a problem with the DNS server can trigger the Windows 11 LAN speed lag. In this case, you can try switching to a different DNS server like Google (8.8.8.8 and 8.8.4.4), Cisco OpenDNS (208.67.222.222 and 208.67.220.220), and Cloudflare DNS (1.1.1.1 and 1.0.0.1). Here’s how to do that:

Fix 3. Change the Speed and Duplex Settings

If you have the Speed and Duplex settings selected improperly, you may also experience the Windows 11 LAN speed lag problem. So, it’s important to make sure that your Duplex settings match the bandwidth. For that:

Fix 5. Uninstall the VPN Client

Some users reported that a third-party VPN client can slow down the LAN speed on Windows 11. If this scenario applies to you, you can try turning off the VPN and uninstalling the client.

Fix 7. Disable IPv6

Some users reported that they managed to fix the Windows 11 LAN speed lag problem by disabling IPv6. Here you may have a try.

Fix 8. Disable Large Send Offload

In addition, disabling the Large Send Offload feature can help fix the slow LAN speed issue in Windows 11. Here’s how to do that:

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