• A slow LAN speed can be very frustrating, especially when downloading or streaming content.
  • The following guide will teach you how to troubleshoot common causes of slow LAN speeds.
  • Our Network Fix page for more network related troubleshooting articles.
  • We also have a Fix section that is full of helpful articles if you need more help with your PC.

Slow LAN speed on Windows 10 PCs [FIX]

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Thanks to recent technological developments, most Internet users can take advantage of fast connections, which makes surfing the web a very pleasant experience.

It is a known fact that the data transfer rate is higher with LAN connections as compared to Wi-Fi.

However, sometimes users may also experience slow LAN speeds due to various issues: outdated drivers, certain browser settings, etc.

Interestingly, many Windows 10 users complained about slow LAN speed issues shortly after upgrading to the latest Microsoft OS.

How do I fix slow LAN speed issues on Window 10 PCs?

A slow LAN speed can be a big problem, especially if you use an Ethernet connection to access the Internet. Speaking of LAN speed issues, here are some of the issues users have reported:

  • Slow LAN speed Windows 10, 7 â€“ According to users, this problem can occur in almost any version of Windows and older versions like Windows 7 and 8.1 are no exceptions. If you encounter this problem, just install the latest updates and update your drivers and see if that helps.
  • Slow LAN transfer speed, Netgear router â€“ Many users reported this problem with Netgear routers. This can happen due to your router configuration or hardware failure.
  • Slow file transfer over Gigabit network â€“ Sometimes this problem can occur when using a Gigabit network. To fix it, just check your network adapter settings.
  • Router slow LAN speed â€“If your LAN speed is slow, try disabling the Download Large Send (LSO) feature. Once the feature is disabled, the problem should be resolved.

1. Install the latest OS and driver updates

Slow LAN speed on Windows 10 PCs [FIX]

According to users, sometimes your LAN can become slow if your drivers or system are not up to date. However, you should be able to fix this problem easily by downloading the latest updates.

System updates often fix hardware and software issues, so it’s critical that you keep your system up to date.

Windows downloads and installs updates automatically for the most part, but sometimes you can run into issues with Windows Update and miss an update or two.

However, you can always manually check for updates by doing the following:

  1. Press Windows key + I to open the Settings app.
  2. When the Settings app opens, go to the Update & Security section.

Slow LAN speed on Windows 10 PCs [FIX]

3. Now click on the Check for Updates button.

Slow LAN speed on Windows 10 PCs [FIX]

Windows will now search for available updates and download them automatically in the background. Once your system is up to date, check if the issue is resolved.

Another common cause of this problem can be your drivers. Outdated network drivers can cause this problem and to fix it it is important to keep your drivers up to date.

You can always manually update your drivers by simply downloading them from your manufacturer’s website.

We should mention that updating hardware drivers manually can permanently damage your system if you try to install the wrong version.

Slow LAN speed on Windows 10 PCs [FIX]

You can also update your drivers much faster with a dedicated driver updater like DriverFix.

Download it and run it as it is portable and therefore requires no installation. The program then scans your system for outdated, missing or broken drivers and then repairs them.

If you love the idea of performing complex tasks with the simplest solution, you will love using DriverFix.


2. Disable or uninstall your VPN

Usually VPN programs slow down your internet connection. Your proxy can also cause this problem, but you can easily disable the proxy settings by doing the following:

  1. Open the Settings app and go to the Network & Internet section.

Slow LAN speed on Windows 10 PCs [FIX]

2. Select Proxy in the left pane. In the right pane, uncheck all options.

Slow LAN speed on Windows 10 PCs [FIX]

You can also consider using a VPN solution that actually works without affecting your speed.

One of these services is Private Internet Access, a VPN service developed by Kape Technologies.

It has thousands of servers around the world and offers unlimited bandwidth. Plus, it offers P2P support and Wi-Fi security for added protection.

That said, don’t worry about buffering videos or slow downloads, as that won’t happen with PIA.


3. Check your hardware

Slow LAN speed on Windows 10 PCs [FIX]

Make sure to disconnect your modem from time to time. Leaving it running for days can affect its performance. Also use a different port – the one you are currently using may be faulty.

As a reminder, not all network cables are created equal. Some cables can even slow down your internet connection. The best network cables to use are Cat-6 cables.


4. Disable Windows Auto-Tuning Feature

  1. Press Windows Key + X to open the Win + X menu.
  2. Now select Command Prompt (Admin) or Powershell (Admin) from the menu.

Slow LAN speed on Windows 10 PCs [FIX]

3. Launch the command prompt by typing cmd in the search box.
4. Enter the following command: netsh interface tcp show global
5. Now look for the Auto Adjust Level function of the receive window.
If it’s normal, turn it off.
6. To disable it, type the command netsh int tcp set global autotuninglevel =                             disabled
7. Do a test run to see if this solution resolved the issue.

According to users, you may be able to fix this problem easily by disabling the auto-adjustment feature.

This is a built-in Windows feature and you can disable it from the command prompt.


5. Disable Large Send Offload (LSO)

  1. Press Windows Key + X and choose Device Manager from the list.

Slow LAN speed on Windows 10 PCs [FIX]

2. Double click on your network card and click on the Advanced tab.
3. Select Large Send Offload V2 (IPv4) and set the value to Disabled.

Slow LAN speed on Windows 10 PCs [FIX]

4. Do the same for Large Send Offload V2 (IPv6).
5. Click OK.

If you are experiencing slow LAN speed on your Windows 10 PC, the problem may be the large send download feature.

A number of users reported that they solved the problem simply by disabling the Gigabit auto-disable option, so give that a try as well.

Keep in mind that not all network adapters support this feature, so if you can’t find it, it means your adapter probably doesn’t support it.


6. Change your DNS settings

  1. Type Network and Sharing Center. Select the first result.
  2. Go to Change adapter settings, right click on the Ethernet network interface and select Properties.

Slow LAN speed on Windows 10 PCs [FIX]

3. Select Internet Protocol version 4 (TCP / IPv4) and go to Properties.

Slow LAN speed on Windows 10 PCs [FIX]

4. Select the “Use the following DNS server addresses” option and enter your                             preferred   and  alternate DNS addresses.

Slow LAN speed on Windows 10 PCs [FIX]

If you are having trouble with slow LAN speed, the problem could be your DNS. This problem is usually related to your ISP and your DNS, but you can always change your DNS.

You can use Google public DNS addresses 8.8.8.8 and 8.8.4.4, OpenDNS addresses 208.67.222.222 and 208.67.220.220, or other DNS addresses.

As a reminder, Google also provides the following public IPv6 DNS servers: 2001:4860:4860::8888 and 2001:4860:4860::8844.


7. Change duplex settings

  1. Open the properties of your network adapter.
  2. Navigate to the Advanced tab and select Speed / Duplex Settings. Now set Value to 100 Mb Full Duplex.
  • You can also try other 100Mb values, or you can use the Auto-Negotiation option.
  • Then click OK to save the changes.

Slow LAN speed on Windows 10 PCs [FIX]

According to users, you can sometimes experience slow LAN speeds due to the duplex setting.

After you change your duplex, your LAN speed will increase and everything will start working again.


8. Disable IPv6

  1. Click on the network icon in your system tray. Now select your network from the menu.

Slow LAN speed on Windows 10 PCs [FIX]

2. Select Change adapter options.

Slow LAN speed on Windows 10 PCs [FIX]

3. Now select your network connection, right click and choose Properties from the menu.
4. Locate Internet Protocol version 6 (TCP/IPv6) and disable it.
5. Now click OK to save the changes.

Slow LAN speed on Windows 10 PCs [FIX]

In case you are not familiar, there are two types of IP addresses, IPv4 and IPv6. IPv6 is a newer standard, but in rare cases problems can arise when using IPv6.

To solve the problem, users recommend disabling the IPv6 feature completely. After disabling this feature, check if the problem persists.


9. Enable QoS feature

Slow LAN speed on Windows 10 PCs [FIX]

If your LAN speed is slow, you may be able to solve the problem by enabling the QoS function.

This feature is responsible for limiting your network speed, but a number of users reported that the issue was resolved after enabling QoS on their router.

To do this, you need to open your router’s configuration page and enable QoS. We should mention that QoS is an advanced feature, so it may require some configuration before you can use it properly.

It’s also worth noting that this feature may not be available on your router, so check your router’s manual for more information.


10. Refresh or reset your OS

Slow LAN speed on Windows 10 PCs [FIX]

Updating or resetting Windows can fix several issues that can slow down your connection.

Updating your PC will keep your personal files and settings. Resetting it will reinstall Windows but delete your files, settings, and apps.

For more information about the steps to update or reset your operating system, see the Microsoft support page.

We hope that one of these solutions will help you speed up your LAN connection. If you find other solutions to fix slow LAN speed issues, don’t hesitate to mention the troubleshooting steps in the comments section below.

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