How to Fix “Ethernet Doesn’t Have a Valid IP Configuration” on Windows 11

The “Ethernet doesn’t have a valid IP configuration” error on Windows 11 usually means your computer has detected the wired network connection but has not obtained or configured a usable IP address.

You might see this error when running the Windows Network Troubleshooter. In some cases, Ethernet appears connected, but websites do not load. In others, the computer cannot communicate with your router even though the cable is plugged in.

The problem can be related to your router’s DHCP service, incorrect IP settings, a temporary network adapter issue, or a problem with Windows networking. Fortunately, you can investigate most of these possibilities without reinstalling Windows or changing your entire network configuration.

This guide walks you through the most useful fixes, starting with basic checks and moving to more advanced troubleshooting.

Table of Contents

1. What Does the Error Mean?
2. Restart Your Computer and Router
3. Check the Ethernet Cable and Router Port
4. Set Ethernet to Obtain an IP Address Automatically
5. Release and Renew Your IP Address
6. Reset the Winsock Catalog
7. Reset the TCP/IP Configuration
8. Update or Reinstall the Ethernet Driver
9. Disable and Re-enable the Ethernet Adapter
10. Check Your Router’s DHCP Settings
11. Temporarily Disable Conflicting Network Software
12. Reset Windows Network Settings
13. Check for an IP Address Conflict
14. When to Contact Your Network Administrator
15. Frequently Asked Questions

What Does “Ethernet Doesn’t Have a Valid IP Configuration” Mean?

Every device on an IP network needs an appropriate IP address to communicate with other devices. On most home networks, the router’s DHCP service automatically assigns these addresses to computers, phones, and other connected devices.

When you connect your Windows 11 computer through Ethernet, it normally requests an IP address from the network.

If that process fails or the computer has incorrect network settings, Windows may report that Ethernet does not have a valid IP configuration.

Possible causes include:

• The router’s DHCP service is not responding correctly.
• Windows has an incorrect manual IP address or DNS configuration.
• The network adapter has temporarily stopped working correctly.
• The Ethernet driver is outdated or corrupted.
• A VPN or virtual network adapter is interfering with connectivity.
• Another device is using the same manually assigned IP address.
• The router or network has a configuration problem.

This error is different from “Network cable unplugged.” With a physically disconnected Ethernet link, Windows cannot detect an active connection. With an invalid IP configuration, Windows may detect the connection but still be unable to communicate properly.

Before changing settings, confirm that Windows detects the Ethernet connection. If it reports that the network cable is unplugged, troubleshoot the cable, port, and adapter first.

1. Restart Your Computer and Router

Start with a simple restart. A temporary issue with Windows or your router’s DHCP service can sometimes prevent your computer from obtaining a valid IP address.

Restart Windows 11

1. Save your work.
2. Open the Start menu.
3. Select the Power icon.
4. Click Restart.
5. Wait for Windows to load.
6. Check whether Ethernet works.

Restart your router

If restarting the computer does not help, restart your router if you control it.

1. Follow the manufacturer’s recommended restart procedure.
2. Allow the router to shut down and start again.
3. Wait for its network and internet connections to become ready.
4. Check the Ethernet connection on your computer.

If you have a separate modem and router, allow the modem to reconnect before testing internet access.

A restart may resolve a temporary DHCP or router issue. If the error returns, continue to the next step.

2. Check the Ethernet Cable and Router Port

Although this error usually relates to IP configuration, checking the physical connection is still worthwhile.

An unstable cable or router port can interrupt communication between your computer and the router, preventing a normal DHCP exchange.

Try the following:

1. Disconnect and reconnect both ends of the Ethernet cable.
2. Inspect the connectors for damage.
3. Try a different Ethernet cable if available.
4. Connect the cable to another available LAN port on your router.
5. Wait for Windows to recognize the connection.

If another cable or port fixes the problem, you may have found the cause.

If Windows continues to show an active Ethernet link but reports an invalid IP configuration, focus on the IP and DHCP settings in the following steps.

3. Set Ethernet to Obtain an IP Address Automatically

This is one of the most important checks if your computer normally connects to a home router.

Windows may be configured with a manual IP address that does not match your current network. A manually configured DNS server may also be incorrect.

If your network uses DHCP, Windows should normally obtain its IP address and DNS server settings automatically.

Open the Ethernet adapter properties

1. Press Windows + R.
2. Type ncpa.cpl.
3. Press Enter.
4. Right-click Ethernet.
5. Select Properties.
6. Select Internet Protocol Version 4 (TCP/IPv4).
7. Click Properties.

Review the settings in the IPv4 Properties window.

If your home network uses automatic addressing, select:

• Obtain an IP address automatically
• Obtain DNS server address automatically

Click OK, then close the remaining windows.

Wait a few seconds and check whether the connection works.

Important warning about static IP addresses

Do not automatically switch to DHCP if your workplace, server, printer, or specialized network requires a static IP address.

In that situation, changing the settings could interrupt access to internal resources. Confirm the correct configuration with your network administrator before making changes.

4. Release and Renew Your IP Address

If your computer uses DHCP but has not obtained a usable IP address, you can ask Windows to release its current IPv4 lease and request another one.

This is a useful step when Ethernet is detected but the computer cannot obtain a valid address from the router.

Open Command Prompt

1. Open the Start menu.
2. Type cmd.
3. Open Command Prompt.
4. Run the following command:

ipconfig /release

Next, run:

ipconfig /renew

Wait for the commands to finish and check the results.

If the renewal succeeds, open a browser and test internet access.

If Windows reports that the media is disconnected, the Ethernet link is not active. Return to the cable and adapter troubleshooting steps instead.

If the renewal fails because no DHCP server can be reached, the router may not be responding to the request, or another network issue may be preventing communication.

Check your new IP address

Run:

ipconfig

Find the section for your Ethernet adapter.

On many home networks, a valid private IPv4 address starts with 192.168, 10, or an address within the private 172.16 through 172.31 range. Your default gateway should normally match the address of your router or another appropriate gateway on the network.

If your address begins with 169.254, Windows may have assigned itself an automatic private address because it could not obtain an IPv4 address through DHCP.

This is a useful clue, but it does not identify the exact cause by itself. Continue checking the router, DHCP configuration, and adapter if the problem remains.

5. Reset the Winsock Catalog

Winsock is part of Windows networking and provides an interface that applications use to communicate over network protocols.

A problem with the Winsock catalog can sometimes interfere with network connectivity. Resetting it may help when software or network changes have left the networking configuration in an inconsistent state.

To try this fix:

1. Open the Start menu.
2. Search for Command Prompt.
3. Select Run as administrator.
4. Enter the following command:

netsh winsock reset

5. Press Enter.
6. Follow any instructions displayed.
7. Restart your computer.

After restarting, check the Ethernet connection.

This command does not repair a defective cable or a router that cannot provide an IP address. If the problem remains, move on to the TCP/IP reset.

6. Reset the TCP/IP Configuration

Windows maintains TCP/IP settings that control how the computer communicates across IP networks. If those settings become corrupted or inconsistent, resetting them may help.

Open Command Prompt or Windows Terminal as an administrator and run:

netsh int ip reset

Wait for the command to finish, then restart Windows.

After restarting, test Ethernet again.

Be aware that network resets can affect custom configurations. If you use a static IP address or special workplace networking settings, consult your IT team before proceeding.

Also remember that this is not a universal fix. If the router’s DHCP service is unavailable, resetting TCP/IP will not make that service respond.

7. Update or Reinstall the Ethernet Driver

Your Ethernet driver allows Windows to communicate with the network adapter. An outdated, corrupted, or incompatible driver can interfere with network connectivity and DHCP requests.

This is worth investigating if the problem started after a Windows update, a driver update, or a hardware change.

Update the driver

1. Right-click the Start button.
2. Select Device Manager.
3. Expand Network adapters.
4. Right-click your Ethernet adapter.
5. Select Update driver.
6. Choose Search automatically for drivers.
7. Follow the instructions displayed.

If Windows does not find a suitable driver, visit your computer or motherboard manufacturer’s official support website.

Download the correct Ethernet or LAN driver for your exact model and Windows version.

If your computer has no working internet connection, download the driver using another device and transfer it with a USB drive.

Roll back a recent update

If the error began immediately after a driver update, open the Ethernet adapter’s Properties in Device Manager and select the Driver tab.

If Roll Back Driver is available, follow the prompts and restart the computer.

Reinstall the driver

If updating or rolling back does not help, reinstalling the driver may be an option. Download the correct replacement first if possible, then uninstall the adapter through Device Manager and reinstall the manufacturer’s compatible driver according to its instructions.

Avoid removing a driver package unless you have a way to restore a compatible driver.

8. Disable and Re-enable the Ethernet Adapter

Temporarily disabling and re-enabling the Ethernet adapter can force Windows to initialize it again.

This may help if the adapter has become stuck in a state where it no longer communicates correctly with the router.

Follow these steps:

1. Press Windows + R.
2. Enter ncpa.cpl.
3. Press Enter.
4. Right-click Ethernet.
5. Select Disable.
6. Wait about 10 seconds.
7. Right-click Ethernet again.
8. Select Enable.

Wait for Windows to reconnect, then check whether the IP configuration error disappears.

If the connection works temporarily but the error returns, investigate the driver, DHCP service, and network settings rather than repeatedly restarting the adapter.

9. Check Your Router’s DHCP Settings

If Windows cannot obtain an IP address automatically, the router’s DHCP service may be part of the problem.

DHCP automatically assigns addresses to devices joining the network. If the service is disabled, its address pool is exhausted, or its configuration is incorrect, a computer may fail to obtain an appropriate IP address.

Check whether other devices can connect

Connect another device to the same router.

If several devices cannot obtain IP addresses, the problem may involve the router or its DHCP configuration.

If other devices work normally but your computer does not, the issue may be limited to your computer, its adapter, or its network configuration.

Review the router configuration

If you administer the router, sign in to its management interface using the manufacturer’s instructions.

Look for its LAN or DHCP settings. The exact menu names vary by router model.

Check that:

• DHCP is enabled if your network is designed to use automatic addressing.
• The DHCP address pool has available addresses.
• The router’s LAN configuration matches the intended network.
• There are no unexpected restrictions preventing your computer from receiving an address.

Do not change these settings randomly. An incorrect LAN address or DHCP range can disconnect multiple devices.

On a workplace network, do not access or modify managed DHCP settings yourself. Ask the network administrator to investigate.

10. Temporarily Disable Conflicting Network Software

VPN clients, virtual-machine software, and some network utilities install virtual adapters or network filters. In certain situations, these can contribute to connectivity problems.

This does not mean VPN software is automatically responsible for the error. However, if the issue began after installing or updating network software, a controlled test may help.

Try these steps:

1. Disconnect from your VPN using its normal interface.
2. Check whether Ethernet works without the VPN connection.
3. Review recently installed network-related software.
4. Consult the software provider’s instructions if you suspect a compatibility problem.

Do not permanently disable your firewall or antivirus to troubleshoot an IP configuration error.

If you use a work VPN or managed security software, contact your IT team before changing its configuration or uninstalling it.

11. Reset Windows Network Settings

If the cable, router, and driver appear to be working but Windows still cannot establish a usable network configuration, consider a network reset.

A reset reinstalls network adapters and restores certain settings to their defaults. It may also affect VPN software, virtual network adapters, and custom networking configurations.

To perform the reset:

1. Open Settings.
2. Select Network & internet.
3. Choose Advanced network settings.
4. Select Network reset.
5. Click Reset now.
6. Confirm the action.
7. Allow Windows to restart if prompted.

After restarting, check the Ethernet connection again.

If your network requires a static IP address or specialized settings, make sure you know how to restore them before proceeding.

A network reset is best treated as a later troubleshooting step. It cannot fix a router with a failed DHCP service or a physically defective Ethernet port.

12. Check for an IP Address Conflict

An IP address conflict occurs when two devices on the same network attempt to use the same address.

This can happen when devices are configured with overlapping static IP addresses or when DHCP reservations and manual configurations are not coordinated correctly.

Possible symptoms include intermittent connectivity, warnings about duplicate IP addresses, or difficulty communicating with other devices.

Check for duplicate address configuration

If you manually configured your computer’s IP address, confirm that it is not being used by another device.

On a network that uses DHCP, allowing Windows to obtain an address automatically may resolve a conflict caused by an inappropriate manual setting.

If you need a static IP address, ask your network administrator or consult your router’s configuration to identify an unused address that fits the network’s addressing plan.

Do not simply choose a random address. An incorrect subnet, gateway, or duplicate address can create additional problems.

13. When to Contact Your Network Administrator

If the error persists after checking the adapter, renewing the IP address, and reviewing your configuration, the problem may require access to equipment or settings you do not control.

Contact your network administrator if:

• Other computers on the same network are also unable to obtain IP addresses.
• Your network uses static IP addresses or special VLAN configurations.
• The router or DHCP server is managed by your workplace.
• You receive a duplicate IP address warning.
• You cannot change the required network settings yourself.

For a home network, contact your router manufacturer or internet provider if multiple devices are affected and the router appears unable to provide normal connectivity.

Remember that an IP configuration error on one computer does not automatically mean your internet provider is experiencing an outage. First determine whether other devices on the same network are affected.

Frequently Asked Questions

What causes an invalid IP configuration on Windows 11?

Common causes include a failed DHCP request, incorrect manual IP settings, a temporary adapter problem, a faulty driver, or an IP address conflict. The router’s DHCP service may also be unavailable or incorrectly configured.

Does ipconfig /renew fix this error?

It can help if Windows is using DHCP and the router can provide a valid IP address. If the DHCP server is unavailable or the physical Ethernet link is disconnected, renewing the address will not solve the underlying problem.

Why does my Ethernet IP address start with 169.254?

Windows may assign itself an address in the 169.254.0.0/16 range when it cannot obtain an IPv4 address through DHCP. This often points to a problem obtaining an address, but it does not identify whether the cause is the router, cable, adapter, or configuration.

Should I use a static IP address to fix this error?

Not automatically. A static IP address can help in networks designed to use one, but choosing an arbitrary address may create conflicts or disconnect your computer. Most home networks use DHCP, so automatic addressing is normally appropriate unless your network administrator specifies otherwise.

Can an Ethernet driver cause an invalid IP configuration error?

Yes. A problematic driver can interfere with communication between Windows and the network adapter. Updating, rolling back, or reinstalling a compatible driver may help if the driver is responsible.

Will restarting my router fix the problem?

It may help if the router’s DHCP service or network connection has temporarily stopped responding. If multiple devices cannot obtain IP addresses, investigate the router’s DHCP configuration or contact the person responsible for managing the network.

Is this error the same as “Network Cable Unplugged”?

No. “Network Cable Unplugged” generally means Windows cannot detect an active physical Ethernet link. An invalid IP configuration means Windows has a problem obtaining or using a valid IP configuration, even though the physical connection may be detected.

Conclusion

The “Ethernet doesn’t have a valid IP configuration” error on Windows 11 often points to a problem obtaining or using an IP address. In many home networks, the first things to check are the router’s DHCP service and the computer’s IPv4 settings.

Start by restarting your computer and router, confirming the physical connection, and checking that Ethernet is configured to obtain an IP address automatically when appropriate. If the problem continues, renew the IP address, investigate the adapter driver, and consider resetting Windows networking.

If multiple devices are affected, investigate the router or DHCP server. If only one computer has the issue, focus on its adapter, driver, and configuration.

By identifying where the IP configuration process is failing, you can choose the right fix instead of making unnecessary changes to your network.