An Ethernet connection should provide a stable internet connection without the signal drops that can sometimes affect Wi-Fi. But if your wired connection keeps disconnecting on Windows 11, you may experience interrupted downloads, dropped video calls, online games losing connection, or websites suddenly stopping during loading.
The confusing part is that Ethernet may work perfectly for several minutes before disconnecting again. Sometimes the connection returns automatically. In other cases, you may need to unplug the cable, disable the network adapter, or restart your computer to get back online.
This problem can come from a loose Ethernet cable, a faulty router port, an outdated network driver, power-management settings, or a malfunctioning adapter. The key is to determine whether the connection is dropping because of the physical hardware or because Windows is having trouble managing the network adapter.
This guide explains how to fix Ethernet that keeps disconnecting on Windows 11, starting with the simplest checks and moving to more advanced troubleshooting.
Table of Contents
- Check the Ethernet Cable and Connections
- Try a Different Router or Switch Port
- Restart Your Computer and Router
- Check Whether the Problem Affects Other Devices
- Disable Ethernet Power-Saving Settings
- Update or Roll Back the Ethernet Driver
- Disable and Re-enable the Network Adapter
- Check Speed and Duplex Settings
- Turn Off Conflicting Network Software Temporarily
- Troubleshoot USB Ethernet Adapters and Docking Stations
- Run the Windows Network Troubleshooter
- Reset Windows Network Settings
- Check for Overheating or Hardware Problems
- Identify Whether the Problem Is Local or ISP-Related
- Frequently Asked Questions
1. Check the Ethernet Cable and Connections
Start by checking the cable, even if it looks fine and works most of the time.
A damaged Ethernet cable can maintain a connection initially but lose it when the cable moves slightly or the connection becomes unstable. A loose connector can cause similar symptoms.
Follow these steps:
- Disconnect the Ethernet cable from your computer.
- Inspect the connector for damage, especially the small plastic locking tab.
- Reconnect it firmly until it clicks into place.
- Check the other end connected to your router, modem, or network switch.
- Make sure both ends are secure.
- Observe whether the connection drops again.
If the cable runs under a desk, behind furniture, or along a wall, inspect it for crushed sections, sharp bends, or visible damage.
Test with another cable
If the connection continues to drop, replace the existing cable temporarily with one that you know works.
Use the new cable for long enough to determine whether the issue returns. A connection that remains stable with the replacement cable strongly suggests that the original cable or its connectors were responsible.
Do not immediately replace your computer’s network card just because Ethernet disconnects repeatedly. A cable replacement is a much simpler test and can save you unnecessary expense.
2. Try a Different Router or Switch Port
Sometimes the cable is fine, but the port connecting your computer to the network is unreliable.
Routers and network switches often have multiple LAN ports. If one port has a hardware fault or an unusual configuration, the connection may drop repeatedly.
To test this:
- Locate the LAN port where your Ethernet cable is currently connected.
- Disconnect the cable.
- Connect it to another available LAN port.
- Wait for Windows to reconnect.
- Use the internet normally and check whether the problem returns.
If the new port works consistently, the original port may be faulty or configured differently.
If you use a separate modem and router, remember that the router’s WAN or Internet port usually serves a different purpose from its LAN ports. Connect your computer to an appropriate LAN port unless your equipment’s instructions specify otherwise.
For an office network, avoid moving cables between managed switch ports without permission. Some workplace ports have specific network or security configurations.
3. Restart Your Computer and Router
A temporary problem with Windows or your network equipment can sometimes cause repeated disconnections.
Restarting both devices is a useful early troubleshooting step.
Restart Windows 11
- Save your work.
- Open the Start menu.
- Select the Power icon.
- Click Restart.
- After Windows starts, reconnect to the network if necessary.
Restart your router
If the problem continues, restart your router or switch if you control it and can safely do so.
- Follow the manufacturer’s recommended restart procedure.
- Allow the equipment to shut down and restart fully.
- Wait until its network connection is ready.
- Check whether your computer’s Ethernet connection remains stable.
If your setup includes a separate modem and router, allow the modem to establish its connection before testing internet access through the router.
A restart may fix a temporary software or device-state problem, but it will not repair a defective cable or failing Ethernet port. If the disconnects return, continue with the following steps.
4. Check Whether the Problem Affects Other Devices
Before changing Windows settings, determine whether the problem is limited to your computer.
If another computer is available, connect it to the same router using a known-working Ethernet cable.
Use the second device for a while and observe whether it disconnects too.
The results can help narrow down the cause:
- Only your computer disconnects: Focus on its Ethernet adapter, driver, power settings, or hardware.
- Multiple computers disconnect through the same router port: The port or its configuration may be responsible.
- Multiple devices disconnect through different ports: Investigate the router, switch, or broader network.
- Ethernet stays connected but all devices lose internet access: The issue may involve the router’s internet connection or your internet service provider.
If you have no second computer, you can still test a different cable and port. These simple checks eliminate several common causes without requiring additional equipment.
5. Disable Ethernet Power-Saving Settings
Windows can manage the power used by network adapters. On some systems, adapter power-saving behavior may contribute to connection problems, especially after sleep or periods of inactivity.
This is worth checking if Ethernet disconnects after your computer wakes up or when it has been idle.
Change the adapter’s power-management setting
- Right-click the Start button.
- Select Device Manager.
- Expand Network adapters.
- Right-click your Ethernet adapter.
- Select Properties.
- Open the Power Management tab, if available.
- Review the option labeled Allow the computer to turn off this device to save power.
As a test, clear this checkbox and click OK.
Restart your computer and see whether the connection remains stable.
Not every Ethernet adapter displays this tab. If the option is missing, do not assume that something is wrong with Windows.
Check advanced adapter power settings
Some adapters include additional power-related options under the Advanced tab in Device Manager. Their names and behavior vary by manufacturer.
Avoid disabling every setting you do not recognize. Change only a setting that is clearly relevant to power management, and test one change at a time.
If the problem started after sleep or hibernation, this step is more relevant than changing unrelated network settings.
6. Update or Roll Back the Ethernet Driver
A network driver helps Windows communicate with the physical Ethernet adapter. If the driver is outdated, corrupted, or incompatible with a recent system update, the connection may become unstable.
Driver troubleshooting is particularly useful when the problem began after a Windows update or installing new hardware.
Update the driver through Device Manager
- Right-click Start.
- Open Device Manager.
- Expand Network adapters.
- Find your Ethernet adapter.
- Right-click it and select Update driver.
- Choose Search automatically for drivers.
- Follow any instructions displayed by Windows.
Windows may not always find the newest driver available for your specific device.
If the issue continues, visit your computer manufacturer’s official support website and search for your exact model. Download the compatible Ethernet or LAN driver for Windows 11.
For a custom-built desktop, check the motherboard manufacturer’s support page or the network adapter manufacturer’s official website.
Avoid unofficial driver-download websites, which may provide incompatible or unwanted software.
Roll back the driver if the problem started recently
If Ethernet began disconnecting immediately after a driver update, the previous version may have been more stable.
To check whether rollback is available:
- Open Device Manager.
- Right-click the Ethernet adapter.
- Select Properties.
- Open the Driver tab.
- Click Roll Back Driver if the button is available.
- Follow the prompts.
Restart Windows if required and test the connection again.
The rollback option may be unavailable if Windows does not have an earlier driver version stored.
7. Disable and Re-enable the Network Adapter
Sometimes the Ethernet adapter becomes stuck in an abnormal state. Disabling and re-enabling it can force Windows to initialize the connection again.
This is especially useful if the connection returns temporarily whenever you restart the adapter.
Follow these steps:
- Press Windows + R.
- Type
ncpa.cpl. - Press Enter.
- Find the Ethernet connection.
- Right-click it and select Disable.
- Wait approximately 10 seconds.
- Right-click it again and select Enable.
Allow Windows a few seconds to reconnect.
If Ethernet starts working normally but disconnects again later, this is a clue rather than a permanent solution. Continue checking the driver, cable, port, and power-management settings.
You can also check whether the adapter disappears from the Network Connections window when the problem occurs. If it disappears entirely, Device Manager may provide additional information about whether Windows is still detecting the hardware.
8. Check Speed and Duplex Settings
Ethernet adapters negotiate a connection with the router or switch. In some situations, incompatible or manually configured link-speed settings can contribute to an unstable connection.
However, do not start here. Test the cable and port first because those are easier to rule out.
To review the setting:
- Open Device Manager.
- Expand Network adapters.
- Right-click your Ethernet adapter.
- Select Properties.
- Open the Advanced tab.
- Find Speed & Duplex, if available.
If the setting has been manually configured, try returning it to Auto Negotiation.
Click OK and test the connection.
The available options differ between adapters. Forcing a particular speed can make things worse if the connected router or switch does not support the same setting.
If the network is managed by your workplace, consult the IT team before changing advanced adapter properties.
9. Turn Off Conflicting Network Software Temporarily
Certain applications install network filters or virtual adapters that affect how traffic passes through Windows. Examples include VPN clients, some security products, virtual-machine software, and specialized network-management tools.
These applications are not automatically responsible for Ethernet disconnects. However, if the problem started after installing or updating one of them, a temporary test may help.
Try the following:
- Check whether you recently installed or updated a VPN or network utility.
- Disconnect from the VPN using its normal interface.
- Test the Ethernet connection without changing unrelated security settings.
- If appropriate, consult the software provider’s instructions for troubleshooting network adapters or filters.
Do not permanently disable your firewall or antivirus to test this problem. Those protections are important, and disabling them can create unnecessary risk.
If the connection drops even when the application is not actively being used, the issue may still involve the adapter driver, physical connection, or other network equipment.
For work computers, speak with your IT team before removing security software or changing VPN configuration.
10. Troubleshoot USB Ethernet Adapters and Docking Stations
If your laptop connects through a USB-to-Ethernet adapter or docking station, the accessory itself may be responsible for repeated disconnections.
A loose USB connection, faulty hub, insufficient dock power, incompatible driver, or damaged adapter can interrupt Ethernet even when the network cable is fine.
Try these steps:
- Disconnect the Ethernet adapter or docking station.
- Reconnect it securely.
- Try another compatible USB port.
- Connect the Ethernet cable directly to the adapter, avoiding unnecessary hubs.
- Test a different Ethernet cable.
- Check Device Manager for adapter errors.
- Install compatible drivers or firmware from the manufacturer’s official website if needed.
If you use a powered docking station, check its power supply and the connection between the dock and computer.
If possible, test the adapter on another compatible computer. If the connection also drops there, the accessory or cable becomes a stronger suspect.
For laptops with a built-in Ethernet port, this section is less relevant. Focus on the built-in adapter and its driver instead.
11. Run the Windows Network Troubleshooter
Windows 11 includes network troubleshooting tools that may identify certain configuration or connectivity problems.
To access the available options:
- Open Settings.
- Select System.
- Choose Troubleshoot.
- Open Other troubleshooters.
- Look for the network-related troubleshooter available on your Windows version and run it.
You can also open Settings > Network & internet and review the status and troubleshooting options shown for your Ethernet connection.
The exact tools available can vary by Windows version and configuration.
A troubleshooter may detect an adapter or network configuration issue, but it cannot physically repair a damaged cable or failing router port. If the report does not identify a cause, continue with the hardware and driver checks rather than repeatedly running the same diagnostic.
12. Reset Windows Network Settings
If the Ethernet cable and hardware appear to be working, but Windows continues to experience connectivity problems, a network reset may help.
A reset reinstalls network adapters and restores certain networking settings to their defaults. It can also affect VPN software, virtual adapters, and custom network configurations.
Before proceeding, make sure you understand any special settings required by your workplace or network.
How to reset network settings
- Open Settings.
- Select Network & internet.
- Choose Advanced network settings.
- Select Network reset.
- Click Reset now.
- Confirm the reset and allow Windows to restart if prompted.
After Windows restarts, test Ethernet again.
A network reset is not the first choice for a connection that physically drops. It is more useful when the cable and ports appear reliable but the Windows network configuration may be damaged.
Should you use Command Prompt commands?
Commands such as ipconfig /release, ipconfig /renew, and ipconfig /flushdns can help with specific IP-address or DNS problems.
However, they do not repair a cable that loses its physical connection. If Ethernet disconnects at the adapter level, focus on the cable, ports, adapter, and driver first.
Use IP configuration troubleshooting when the Ethernet link remains active but you experience a separate problem obtaining an address or reaching websites.
13. Check for Overheating or Hardware Problems
If the connection drops under heavy use, such as large downloads or prolonged transfers, consider whether the network adapter, docking station, or router may be overheating or malfunctioning.
This is not the most common explanation, but it becomes more relevant after you have ruled out cables, ports, and drivers.
Look for patterns:
- Does the connection drop after the computer has been running for a long time?
- Does it happen during large file transfers?
- Does the Ethernet adapter disappear from Windows when the problem occurs?
- Does restarting the computer restore the connection temporarily?
- Does a USB adapter become unusually hot?
Keep vents clear and make sure external networking equipment has adequate ventilation. If a device becomes excessively hot, smells unusual, or shows signs of physical damage, stop using it and seek appropriate support.
If the problem continues across multiple known-working cables and network ports, a technician may need to test the computer’s Ethernet hardware. A compatible USB Ethernet adapter can sometimes provide a practical alternative if the built-in port has failed.
14. Identify Whether the Problem Is Local or ISP-Related
Not every interruption that occurs while using Ethernet is caused by the same component.
A useful distinction is whether Windows loses the Ethernet link itself or whether the wired connection remains active while internet access disappears.
When the problem occurs, check the Ethernet status in Windows.
If Windows reports that the network cable is unplugged: Start with the physical cable, router port, adapter, docking station, and driver.
If Ethernet remains connected but Windows reports no internet: The computer may still be connected to the local network, while the router, DNS settings, IP configuration, or internet service is experiencing a problem.
If several devices lose internet access at the same time: Check the router and modem, and contact your internet provider if the issue appears to be on their side.
If only one computer disconnects: Concentrate on that computer’s adapter, driver, cable, and port.
This distinction prevents you from spending time changing DNS settings or resetting TCP/IP when the actual problem is a physical Ethernet link that keeps dropping.
Frequently Asked Questions
Why does my Ethernet keep disconnecting on Windows 11?
Common causes include a damaged Ethernet cable, a faulty router port, unstable network drivers, adapter power-management settings, or a malfunctioning Ethernet adapter. Test another cable and port first, then investigate Windows settings if the problem continues.
Why does Ethernet disconnect after my computer wakes from sleep?
The network adapter may not resume correctly after sleep, or its power-management settings may contribute to the problem. Check the adapter’s Power Management tab in Device Manager, if available, and install a compatible driver from the computer manufacturer’s website.
Can an outdated Ethernet driver cause disconnections?
Yes. An incompatible or corrupted driver can cause the adapter to behave unpredictably. Update the driver through Device Manager or install a compatible version from the official manufacturer website. If the problem began immediately after an update, consider rolling back to the previous driver.
Will resetting network settings fix Ethernet disconnecting?
It may help if the problem involves Windows network configuration. However, a network reset will not repair a faulty cable, damaged port, or defective adapter. Test the physical connection before resetting Windows networking.
Why does Ethernet disconnect only during downloads or gaming?
Heavy network activity may expose an existing problem with the cable, port, adapter, driver, or network equipment. Check the cable and router port first. If the problem persists, inspect the adapter driver and hardware, and see whether other devices experience similar interruptions.
How do I know whether my Ethernet port is damaged?
Test the computer with a known-working Ethernet cable and a different working router or switch port. If the computer continues disconnecting across multiple reliable connections while another device works normally, its Ethernet adapter or port may be faulty. A technician can confirm whether hardware replacement is necessary.
Is Ethernet more reliable than Wi-Fi?
A properly functioning wired Ethernet connection is generally less affected by wireless interference and distance from a router. However, Ethernet can still experience interruptions caused by damaged cables, faulty ports, unstable adapters, or network equipment problems.
Conclusion
If Ethernet keeps disconnecting on Windows 11, avoid changing every network setting at once. Start by checking both ends of the Ethernet cable, testing another cable, and switching to a different router or switch port.
If the physical connection appears reliable, investigate the network adapter, its driver, and power-management settings. USB Ethernet adapters and docking stations deserve special attention if your computer connects through external hardware.
Finally, determine whether Windows is actually losing the Ethernet link or whether the connection remains active without internet access. That simple distinction helps you choose the right troubleshooting steps.
By testing one possible cause at a time, you can narrow down the problem and avoid unnecessary resets, software changes, or hardware replacements.