Ethernet connections are generally more stable and faster than Wi-Fi, making them ideal for gaming, streaming, downloads, and office work. However, some Windows users encounter the error message: “An Ethernet cable is not properly plugged in or might be broken” even when the cable appears connected correctly.
This issue is usually caused by faulty Ethernet cables, damaged ports, outdated network drivers, incorrect adapter settings, or temporary network glitches. In some cases, Windows may incorrectly detect the network connection due to driver conflicts or power management settings.
In this guide, we’ll walk you through effective methods to fix the Ethernet cable error on Windows 11.
How to Fix “An Ethernet Cable Is Not Properly Plugged In or Might Be Broken”
Before applying the fixes below, ensure your router or modem is powered on properly and functioning normally. The methods below are arranged from basic hardware checks to advanced troubleshooting solutions.
1. Check the Ethernet Cable Connection
A loose connection is the most common cause of this error.
- Disconnect the Ethernet cable from both the PC and router.
- Reconnect it firmly until you hear a click.
- Check whether the Ethernet status light turns on near the port.
A proper physical connection is essential for detection.
2. Try Another Ethernet Cable
The cable itself may be damaged internally.
- Replace the current Ethernet cable with another working cable.
- Connect it to the same ports.
- Check whether the connection is detected.
Damaged or worn cables often trigger this error.
3. Test Another Router or Port
The issue may come from the router or switch port.
- Connect the cable to another LAN port on the router.
- If possible, test the PC on another network device.
This helps identify whether the problem is hardware-related.
4. Restart Your Network Devices
Temporary network glitches can interrupt Ethernet detection.
- Turn off your PC.
- Restart the router or modem.
- Wait 30–60 seconds.
- Turn everything back on.
This refreshes the network connection.
5. Restart the Ethernet Adapter
Refreshing the network adapter can restore connectivity.
- Press Windows + R, type:
ncpa.cpl - Press Enter.
- Right-click the Ethernet adapter.
- Select Disable.
- Wait a few seconds and select Enable.
This resets the network adapter connection.
6. Update Ethernet Drivers
Outdated or corrupted drivers can prevent cable detection.
- Press Windows + X and open Device Manager.
- Expand Network adapters.
- Right-click your Ethernet adapter.
- Select Update driver.
- Choose Search automatically for drivers.
Updated drivers improve compatibility and stability.
7. Reinstall the Network Adapter
Corrupted driver installations may need a clean reinstall.
- Open Device Manager.
- Right-click the Ethernet adapter.
- Select Uninstall device.
- Restart your PC.
Windows will automatically reinstall the driver after reboot.
8. Disable Power Saving for the Network Adapter
Windows may turn off the adapter to save power.
- Open Device Manager.
- Double-click the Ethernet adapter.
- Go to the Power Management tab.
- Uncheck:
Allow the computer to turn off this device to save power - Click OK.
This prevents the adapter from being disabled automatically.
9. Run the Network Troubleshooter
Windows can automatically detect common network problems.
- Press Windows + I to open Settings.
- Go to System > Troubleshoot > Other troubleshooters.
- Run the Network Adapter troubleshooter.
This may automatically fix connection issues.
10. Reset Network Settings
If the problem persists, reset the entire network configuration.
- Open Settings > Network & Internet.
- Go to Advanced network settings.
- Click Network reset.
- Restart your PC.
This restores all networking components to default settings.
11. Check for Physical Damage
Damaged Ethernet ports can also cause this error.
- Inspect the Ethernet port on the laptop or desktop.
- Look for bent pins, looseness, or dust buildup.
- Clean the port carefully if necessary.
Physical damage may require hardware repair or a USB Ethernet adapter.
Conclusion
The “An Ethernet cable is not properly plugged in or might be broken” error is usually caused by faulty cables, damaged ports, outdated drivers, or network adapter issues. By following the methods outlined in this guide, you can identify the root cause and restore your wired internet connection.
From checking the cable and updating drivers to resetting network settings, these solutions cover both simple and advanced troubleshooting methods. Once fixed, your Ethernet connection should work normally again on Windows 11.
