Ethernet Doesn’t Have A Valid IP Configuration (Fixed)

Ethernet Doesn't Have A Valid IP Configuration

The issue of “Ethernet doesn’t have a valid IP configuration” is a common problem that many users encounter, a common challenge especially faced by Windows users.

When this error message appears, it means that there is an issue with the network connection, specifically with the IP configuration.

This can prevent the device from connecting to the internet or local network.

In this blog post, we’ll take a deep dive into the issue and offer a few simple solutions to sort this issue out, helping you find the quick fix to handle it yourself.

Understanding Ethernet And The Root Cause Of The Issue

Ethernet is a widely used method for connecting devices in a network through wired connections. It ensures that data is sent and received efficiently.

Each device connected via Ethernet gets a unique IP address, which helps in identifying it on the network.

However, sometimes, users face the “Ethernet doesn’t have a valid IP configuration” error, indicating a problem in this process.

Here are some common causes:

  1. DHCP Issues: DHCP (Dynamic Host Configuration Protocol) is responsible for giving out IP addresses. If there’s a problem with DHCP, devices might not receive a valid IP address, leading to the error.
  2. Outdated Network Adapter Drivers: These drivers act as mediators between the computer’s hardware and software. If outdated or corrupt, they can disrupt the IP assignment process.
  3. Network Configuration Errors: Changing settings or connecting to different networks can sometimes create conflicts in the network configurations.
  4. Hardware Problems: Damaged Ethernet cables or malfunctioning ports can also prevent a device from getting a valid IP address.

Understanding the basics of Ethernet and the cause behind this error can help in finding the right solution.

Initial Checks and Detailed Solution Guide

1. Verify Physical Network Connections

Ensure that all cables are connected securely to the correct ports.

Inspect the Ethernet cable for any visible damage and ensure it is firmly plugged into both the computer and the router or modem.

2. Use Windows’ Network Troubleshooting Tool

Navigate to the system tray and right-click on the network icon.

From the context menu, select “Troubleshoot Problems” to initiate Windows’ built-in network diagnostic tool.

Follow the on-screen prompts to identify and potentially resolve any detected network issues.

Windows Troubleshooting Tool

Step-by-Step Solutions

Solution 1: Clear the network cache using command prompts.

Open Command Prompt or PowerShell as an administrator (as below).

Command Prompt

Type the following commands one by one, pressing Enter after each:

    • ipconfig /release
    • ipconfig /flushdns
    • ipconfig /renew

IPconfig Release

After executing these commands restart your pc and check if the issue still exists.

Solution 2: Updating the Network Adapter Driver

#1. Reinstalling the Network Driver:

  • Open the Device Manager:
    Press Windows + X and select “Device Manager” from the list.
    Device Manager
  • Expand the “Network adapters” section:
    Locate your network adapter in the list.
  • Right-click on your network adapter and select “Uninstall device” option:
    Confirm any prompts that appear.
    Uninstall Device
  • After uninstalling, restart your computer:
    Windows will attempt to automatically reinstall the driver upon startup.

#2. Checking if the Driver is Reinstalled:

  • Open the Device Manager again.
  • Expand the “Network adapters” section: If you see your network adapter listed, it means the driver has been reinstalled.
  • If you don’t see your network adapter, you may need to scan for hardware changes:

#3. Scanning for Available Drivers if it Wasn’t There:

  • In the Device Manager, right-click on the name of your PC (usually at the top of the list) and select “Scan for hardware changes.”
    Scan For Hardware Changes
  • Windows will scan and detect any hardware that doesn’t have drivers installed:
    If it finds your network adapter, it will attempt to install the driver automatically.

#4. Updating the Network Driver:

  • In the Device Manager, right-click on your network driver under the “Network adapters” section.
    Network Driver
  • Select “Update driver.”
  • You’ll be given two options: 
    1. “Search automatically for updated driver software”: This will make Windows search online for the latest driver.
    2. “Browse my computer for driver software”: Use this if you have a driver file on your computer or a disk.
  • If you choose to search automatically and Windows finds an updated driver, it will download and install it automatically.
  • Once the driver is updated, restart your computer for the changes to take effect.

Solution 3: Resetting the TCP/IP Stack

This guide provides a step-by-step process to reset the TCP/IP stack, which can help resolve the “Ethernet doesn’t have a valid IP configuration” error in Windows.

Precaution: Before making any changes to your system settings or drivers, we recommend creating a system restore point. This ensures you can change your system back to a previous state if any issues arise during the troubleshooting process.

1. Accessing the Command Interface:

For Windows 10 and earlier:

  • Open the Windows Search bar and type cmd into it.
  • Right-click on Command Prompt and select Run as administrator.

For Windows 11:

  • You can opt to use the Terminal instead of Command Prompt.
  • Type terminal into the Windows Search bar.
  • Right-click on Terminal and select Run as administrator.
  • In either case, if prompted, click Yes to grant administrative privileges.

2. Resetting the TCP/IP:

  • In the command interface, type netsh int ip reset and press Enter.
  • This command resets the TCP/IP by overwriting its associated registry keys.
    TCP/IP Reset

3. Resetting the Winsock Catalog:

  • Type netshWinsock reset and press Enter.
  • Upon successful execution, you should see the message: “Successfully reset the Winsock Catalog. You must restart the computer to complete the reset.”
    Winsock Reset

4. Restarting Your Computer:

It’s essential to restart your computer to apply the changes made.

Solution 4: Resetting Network Settings

Precaution: This process will erase all saved network settings, including Wi-Fi passwords and VPN configurations. However, it can help resolve the “Ethernet doesn’t have a valid IP configuration” error.

1. Navigate to the Windows Search:

  • Navigate to your Search Bar.
    Network Reset

2. Confirm Network Reset:

  • Click on “Reset now.” This action will change your network configuration back to its default settings.
    Reset Now

3. Restart Your Router:

  • Power off your router and unplug the ethernet cable from your PC.
  • After waiting for a few moments, power your router back on.
  • Reconnect the ethernet cable to your PC.
  • Allow 3 to 4 minutes for the network to stabilize.

Solution 5:  Fixing Ethernet IP Configuration Issues by Disabling Fast Startup

Disabling the fast startup feature in Windows 10 can potentially resolve the ‘Ethernet doesn’t have a valid IP configuration’ error. Follow these steps to disable fast startup:

  1. Press Windows + X on your keyboard and select Power Options from the menu.
  2. In the Power Options window, click on Choose what the power buttons do in the left-hand menu.
  3. Click on Change settings that are currently unavailable.
  4. Scroll down to the Shutdown settings section and uncheck the box next to Turn on fast startup (recommended).
  5. Click on Save changes to apply the settings.

After disabling fast startup, restart your computer and check if the Ethernet connection is working properly.

Advanced Solutions

a. Check router configurations:

  • Open any web browser on your computer.
  • Enter your router’s IP address into the address bar (common addresses include or
  • Log in using your router’s credentials (often “admin” for both username and password by default).
  • Review the configurations, ensuring DHCP is enabled and there are no conflicting settings.
  • Save any changes and restart the router if necessary.

b. Manually configure IP and DNS settings:

  • Right-click on the network icon in the system tray and select “Open Network & Internet settings.”
  • Click on “Change adapter options.”
    Change Adapter Options
  • Right-click on your ethernet connection and select “Properties.”
  • Double-click on “Internet Protocol Version 4 (TCP/IPv4).”
  • Select “Use the following IP address” and enter a valid IP, Subnet mask, and Default gateway (often provided by your ISP or network administrator).
    IP Address Setup
  • For DNS, select “Use the following DNS server addresses” and enter preferred and alternate DNS (like Google’s and
  • Click “OK” to save changes.

Understanding the Solutions: Why Each Step Matters

When the ‘Ethernet Doesn’t Have a Valid IP Configuration’ error pops up, it’s important to understand the reasoning behind each solution.

Here’s a breakdown of the purpose and significance of each step in the above guide:

Solution 1: Clearing the Network Cache Using Command Prompts: The network cache is a repository of past network interactions. Over time, this data can become outdated or corrupt.

Clearing the cache is like giving the system a fresh start, ensuring accurate and efficient connections.

Solution 2: Updating the Network Adapter Driver Drivers act as the bridge between your computer’s hardware and its operating system. An outdated driver can lead to miscommunication and errors.

By updating the driver, we ensure smooth communication between the hardware and the OS.

Solution 3: Resetting the TCP/IP Stack The TCP/IP stack is crucial for internet communications. If there’s an issue here, it can disrupt the entire communication process.

Resetting the stack ensures that data packets are transmitted without hitches.

Solution 4: Resetting Network Settings: As we connect to different networks and modify settings, our network configurations can become cluttered.

Resetting these settings streamlines them, ensuring optimal network performance.

Solution 5: Disabling Fast Startup Fast Startup, while convenient, can sometimes interfere with network settings.

Turning it off ensures that the computer starts afresh, eliminating potential conflicts.


How does DHCP impact the ‘Ethernet doesn’t have a valid IP configuration’ error?

Answer: DHCP automatically assigns IP addresses. If it malfunctions or has incorrect settings, your computer might not get a valid IP, causing the error.

Can multiple Ethernet adapters cause the ‘Ethernet doesn’t have a valid IP configuration’ error?

Answer: Yes. If multiple adapters conflict or try to use the same IP, it can trigger this error. Ensuring distinct IPs or proper DHCP settings can prevent this.


The ‘Ethernet doesn’t have a valid IP configuration’ error highlights the importance of understanding our network systems.

Ethernet, often taken for granted, plays a crucial role in our daily digital interactions. When an issue arises, it’s a call to action, urging us finding solutions.

This guide is more than just a list of fixes. It’s a roadmap to the inner workings of our digital connections.

Each solution sheds light on specific aspects of our network, from the importance of refreshing outdated data to understanding the protocols that keep our online world running smoothly.

Keeping system drivers updated is a simple yet vital step. It reminds us that as technology advances, we must stay updated to ensure everything works seamlessly.

Features like Fast Startup, while designed for convenience, show that sometimes we need to choose between speed and stability.

In the end, this guide is here to help you understand and fix common network issues. By following the steps and solutions provided, you can ensure a stable Ethernet connection.

It’s not just about fixing the problem for now; it’s about understanding it so you can prevent it in the future. With the right knowledge, keeping your connection smooth becomes an easier task.

Use this guide as a reference whenever you face network challenges, and you’ll be back online in no time.”

Daniele Besana

Daniele Besana

Daniele is a freelancer consultant with 15 years of experience in network security, customer support, Linux and Salsa. He worked for Juniper Networks in Netherlands, providing support and consultancy on security projects across Europe and Middle-East.

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