How to troubleshoot and fix Ethernet connection not working or showing as unplugged in Windows 11

Summary

This guide helps you troubleshoot and resolve: How to troubleshoot and fix Ethernet connection not working or showing as unplugged in Windows 11. Follow the steps below to fix the issue.

Common Causes

If your Windows 11 computer is showing your wired Ethernet connection as unplugged, has no link lights on the network port, or simply refuses to connect to your router or switch, this guide will walk you through the most common causes and fixes. Most Ethernet problems can be resolved in a few minutes with the right checks, starting with the physical cable and working through to driver and settings issues.

Quick Fix Steps

If you're in a hurry, work through these checks first. They resolve the majority of Ethernet connection issues:

1. Confirm both ends of the Ethernet cable are firmly seated in the computer and the router, switch, or wall outlet.
2. Check for link lights on the network port and on the corresponding port of your router or switch.
3. Restart the computer and the router or switch.
4. Try a different Ethernet cable.
5. Try a different port on the router or switch.
6. Run the built-in network troubleshooter in Windows 11.

If the issue persists after these steps, continue to the detailed troubleshooting below.

Detailed Troubleshooting

1. Check the Physical Connection

Before changing any settings, rule out the simplest causes. A loose or damaged cable is the most common reason an Ethernet adapter shows as unplugged.

• Unplug the Ethernet cable from both ends and reconnect it, ensuring you hear or feel a soft click as the RJ45 connector latches into place.
• Inspect the cable for kinks, crushed sections, or damaged connectors. A bent or broken plastic tab on the connector will prevent a reliable connection.
• Look at the network port on your computer. Most desktops and laptops have small LED indicators next to the Ethernet socket. If no light appears when the cable is plugged in, the cable, port, or device on the other end is the likely culprit.
• Try a known-good Cat5e or Cat6 cable. Cables can fail internally without any visible damage.
• Plug the cable into a different port on your router or switch. If a different port works, the original port may be faulty.

2. Restart Your Equipment

A simple reboot resolves temporary glitches in network hardware and the Windows networking stack.

1. Save any open work and shut down your computer.
2. Power off your router or switch.
3. Wait at least 30 seconds.
4. Power the router or switch back on and wait until its status lights indicate it has finished booting (usually 1–2 minutes).
5. Start your computer and allow Windows 11 to fully load.
6. Check whether the Ethernet connection is now active.

3. Run the Windows Network Troubleshooter

Windows 11 includes a built-in troubleshooter that can detect and automatically repair common networking problems.

1. Right-click the Start button and select Settings.
2. Go to System > Troubleshoot > Other troubleshooters.
3. Find Network and Internet and click Run.
4. Follow the prompts and apply any recommended fixes.
5. Restart your computer when prompted.

You can also reach the troubleshooter by right-clicking the network icon in the system tray and selecting Diagnose network problems.

4. Confirm the Ethernet Adapter Is Enabled

It's possible the Ethernet adapter has been disabled, either manually or by a power management setting.

1. Right-click the Start button and select Device Manager.
2. Expand the Network adapters section.
3. Right-click your Ethernet adapter (commonly labelled Realtek PCIe GbE Family Controller, Intel Ethernet Connection, or similar).
4. If Enable device is available, click it. If Disable device is shown, the adapter is already enabled.
5. Close Device Manager and test the connection.

5. Check Network Adapter Power Management

Windows can power down the Ethernet adapter to save energy, which sometimes prevents the connection from coming back after sleep or hibernation.

1. Open Device Manager as described above.
2. Right-click your Ethernet adapter and select Properties.
3. Click the Power Management tab.
4. Untick Allow the computer to turn off this device to save power.
5. Click OK and restart the computer.

6. Disable Energy Efficient Ethernet

Some network adapters include a feature called Energy Efficient Ethernet (EEE) that can cause connectivity drops or prevent a link from establishing. Disabling it often resolves stubborn issues.

1. In Device Manager, right-click your Ethernet adapter and select Properties.
2. Click the Advanced tab.
3. Select Energy Efficient Ethernet (or Green Ethernet on some Realtek adapters) from the list.
4. Change the Value to Disabled.
5. Click OK and test the connection.

7. Update or Reinstall the Network Driver

An outdated, corrupted, or incompatible driver is a common cause of Ethernet problems, particularly after a Windows update.

Update the driver automatically:

1. Open Device Manager.
2. Expand Network adapters, right-click your Ethernet adapter, and select Update driver.
3. Choose Search automatically for drivers.
4. Follow the prompts to install any available updates.
5. Restart the computer.

Reinstall the driver:

1. Open Device Manager.
2. Right-click your Ethernet adapter and select Uninstall device.
3. Tick Attempt to remove the driver for this device if the option appears, then click Uninstall.
4. Restart the computer. Windows 11 will attempt to reinstall a working driver automatically.

Install the manufacturer's driver:

1. Identify your adapter's make and model from Device Manager.
2. Visit the manufacturer's website (for example, Intel, Realtek, or your computer manufacturer's support page).
3. Download the latest Windows 11 driver for your specific model.
4. Run the installer and restart the computer.

8. Reset the Network Stack

Resetting Windows networking components can clear out corrupted settings that prevent Ethernet from working.

1. Right-click the Start button and select Terminal (Admin) or Windows PowerShell (Admin).
2. Type the following commands, pressing Enter after each one:

   netsh winsock reset
   netsh int ip reset
   ipconfig /release
   ipconfig /renew
   ipconfig /flushdns

3. Restart your computer and test the connection.

9. Check for Windows Updates

A pending Windows update can sometimes include driver fixes that resolve Ethernet issues, particularly after a major feature update.

1. Open Settings from the Start menu.
2. Go to Windows Update.
3. Click Check for updates.
4. Install any available updates, including optional driver updates.
5. Restart your computer when prompted.

10. Test with a USB to Ethernet Adapter

If none of the above steps resolve the issue, the built-in Ethernet port on your computer may have failed. A USB to Ethernet adapter is an inexpensive way to confirm this and continue using a wired connection.

• Plug a USB to Ethernet adapter into a USB port on your computer.
• Connect your Ethernet cable to the adapter.
• Allow Windows 11 a minute or two to detect the new adapter and install a driver.
• If the connection works through the adapter, the original Ethernet port is likely faulty and may require service.

Working through these steps in order will resolve the vast majority of Ethernet connection problems on Windows 11. If the issue persists after trying all of them, the fault is likely hardware-related and you may need to contact your computer manufacturer or a qualified technician for further diagnosis.

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