Slow LAN speed on Windows 10 PCs [FIX]

By: Madeleine Dean
7 minute read

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Thanks to recent advancements in technology, most internet users can benefit from high-speed connections, making web browsing a very pleasant experience. It’s a well-known fact that data transfer speed is higher with LAN connections compared to Wi-Fi. However, sometimes users can also experience slow LAN speeds due to various issues: outdated drivers, particular browser settings, and so on.

Interestingly enough, many Windows 10 users complained about slow LAN speed issues shortly after they upgraded to Microsoft’s latest OS.

I recently upgraded my system from windows 8.1 to 10, then I faced a problem that although I was having a very fast internet connection but I was experiencing a very slow browsing & download. Please help…..

How to fix slow LAN speed issues on Window 10 PCs

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 problems that users reported:

  • Slow LAN speed Windows 10, 7 – According to users, this issue can appear on almost any version of Windows, and older versions such as Windows 7 and 8.1 aren’t exceptions. If you encounter this problem, simply install the latest updates and update your drivers and check if that helps.
  • Slow LAN transfer speed, Netgear router – Many users reported this issue with Netgear routers. This can occur due to your router settings or hardware failure.
  • Slow file transfer over Gigabit network – Sometimes this issue can appear while using a Gigabit network. To fix it, just check your network adapter settings.
  • Router slow LAN speed – If your LAN speed is slow, try disabling Large Send Offload (LSO) feature. Once the feature is disabled, the issue should be resolved.

 Solution 1 – Check your hardware

Don’t forget to unplug your modem from time to time. Keeping it working for days on end may affect its performance. Also, use a different port: the one you’re currently using may be broken.

As a quick reminder, not all network cables are created equally. Actually, some cables may even slow down your internet connection. The best network cables to use are Cat–6 cables.


Solution 2 – Install the latest OS and driver updates

According to users, sometimes your LAN can become slow if your drivers or system are out of date. However, you should be able to fix this problem simply by downloading the latest updates. System updates often fix hardware and software issues, therefore it’s crucial that you keep your system updated.

Windows downloads and installs updates automatically for the most part, but sometimes issues with Windows Update can occur and you might miss an update or two. However, you can always check for updates manually by doing the following:

  1. Press Windows Key + I to open the Settings app.
  2. When Settings app opens, go to Update & Security section.
    Slow file transfer over Gigabit network
  3. Now click Check for updates button.
    Slow LAN speed Windows 7

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

Another common cause of this problem can be your drivers. Outdated network drivers can cause this issue to appear, and in order to fix it, it’s important to keep your drivers up to date. You can always update your drivers manually simply by downloading them from your manufacturer’s website.

We must mention that updating hardware drivers manually can permanently damage your system in case you will try to install the wrong version. We strongly recommend TweakBit’s Driver Updater (approved by Microsoft and Norton) to automatically download all the outdated drivers on your PC.

Disclaimer: some features of this tool are not free.


Solution 3 – Disable Windows Auto-Tuning Feature

According to users, you might be able to fix this problem simply by disabling the Auto-Tuning feature. This is a built-in feature of Windows, and you can disable it from Command Prompt. To do that, just follow these steps:

  1. Press Windows Key + X to open Win + X menu. Now select Command Prompt (Admin) or Powershell (Admin) from the menu.
    Slow LAN Netgear router
  2. Launch Command Prompt by typing cmd in the search box.
  3. Type the following command: netsh interface tcp show global
  4. Now, look for the Receive Window Auto-Tuning Level feature. If it’s “normal”, disable it.
  5. To disable it, type the command netsh int tcp set global autotuninglevel=disabled
  6. Perform a test to see if this workaround solved the problem.

Solution 4 – Disable Large Send Offload (LSO)

If you’re experiencing slow LAN speed on your Windows 10 PC, the issue might be Large Send Offload feature. In order to solve the problem, you just need to disable this feature by doing the following:

  1. Press Windows Key + X and choose Device Manager from the list.
    Router slow LAN speed
  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.
    Disable Large Send Offload windows 10
  4. Do the same for Large Send Offload V2 (IPv6).
  5. Click OK.

A couple of users reported that they fixed the problem simply by disabling Automatically deactivate Gigabit option, so be sure to try that as well. Keep in mind that not all network adapters support this feature, so if you can’t find it, it means that your adapter probably doesn’t support it.


Solution 5 – Change your DNS settings

If you’re having issues with slow LAN speed, the problem might be your DNS. This issue is usually related to your ISP and its DNS, but you can always change your DNS. This process is relatively simple, and you can do it by following these steps:

  1. Type Network and Sharing Center. Select the first result.
  2. Go to Change adapter settings, right-click the Ethernet network interface, and select Properties.
    Slow file transfer over Gigabit network

  3. For various PC problems, we recommend this tool.

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    1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
    2. Click “Start Scan” to find Windows issues that could be causing PC problems.
    3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

  4. Select Internet Protocol Version 4 (TCP/IPv4) and go to Properties.
    Router slow LAN speed
  5. Select the “Use the following DNS server addresses” option and type your preferred and alternate DNS addresses.
    Slow LAN speed Windows 7

You can use Google’s 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 quick reminder, Google also offers the following IPv6 public DNS servers: 2001:4860:4860::8888 and 2001:4860:4860::8844.


Solution 6 – Disable or uninstall your VPN

Most times, VPN programs slow down your internet connection. If your current VPN client is giving you problems, perhaps you should consider switching to a different VPN. One of the best VPNs out there is CyberGhost VPN, so if your current VPN is slowing down your network connection, it might be a good time for you to switch.

Your proxy can also cause this problem to occur, but you can disable proxy settings with ease by doing the following:

  1. Open the Settings app and navigate to Network & Internet section.
    Slow file transfer over Gigabit network
  2. Select Proxy in the left pane. In the right pane, disable all options.
    Router slow LAN speed

Once your proxy is disabled, check if the problem is still there.


Solution 7 – Change duplex settings

According to users, sometimes you might experience slow LAN speeds due to your duplex settings. This can be a problem, but you can fix this issue by doing the following:

  1. Open your network adapter properties.
  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 Auto Negotiation option. After doing that, click OK to save changes.
    Slow LAN speed Windows 10

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


Solution 8 – Disable IPv6

In case you’re not familiar, there are two types of IP addresses, IPv4 and IPv6. IPv6 is a newer standard, but in some rare cases issues while using IPv6 can occur. To fix the problem, users are recommending to disable the IPv6 feature entirely.

This is relatively simple to do, and you can do it by following these steps:

  1. In your sysbar click the Network icon. Now select your network from the menu.
    Slow LAN speed Windows 10
  2. Select Change adapter options.
    Slow LAN transfer speed
  3. Now select your network connection, right-click it and choose Properties from the menu.
  4. Locate Internet Protocol Version 6 ( TCP/IPv6) and disable it. Now click OK to save changes.
    Slow LAN transfer speed

After disabling this feature, check if the problem is still there.


Solution 9 – Enable QoS feature

If your LAN speed is slow, you might be able to solve the problem by enabling QoS feature. This feature is in charge of limiting your network speed, but a couple 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 have to mention that QoS is an advanced feature, so it might require some configuration before you can properly use it. It’s also worth noting that this feature might not be available on your router, so be sure to check your router’s instruction manual for more information.


Solution 10 – Refresh or reset your OS

Refreshing or resetting Windows can help you eliminate various issues that can slow down your connection. Refreshing your PC keeps your personal files and settings. Resetting it reinstalls Windows, but deletes your files, settings, and apps. For more information about the steps to follow to refresh or reset your OS, check out Microsoft’s Support page.

We hope one of these solutions help you speed up your LAN connection. If you come across other workarounds to fix slow LAN speed issues, feel free to list the troubleshooting steps in the comment section below.


Editor’s Note: This post was originally published in April 2017 and has been since completely revamped and updated for freshness, accuracy, and comprehensiveness.


RELATED STORIES YOU NEED TO CHECK OUT:

For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patended Technologies (requires upgrade).

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