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How to Fix DHCP Error 0x79 on Windows 11: Complete Steps to Solve the Issue

DHCP Error 0x79 on Windows 11 can prevent your computer from obtaining an IP address automatically. This error disrupts your network connection, making it difficult to access the internet or local resources.

Fortunately, this issue is usually fixable with some straightforward troubleshooting steps. You don’t need to be a tech expert to follow along.

This guide will walk you through simple to advanced methods to resolve DHCP Error 0x79 on Windows 11. Each step is explained clearly and in detail.

By the end, you should have a working network connection without this error.

Quick Note: Prerequisites and Initial Checks

Before starting the troubleshooting process, make sure to do these quick checks:

  • Ensure your network cables are securely plugged in if you are using a wired connection.
  • Restart your router and modem to refresh your network settings.
  • Check if other devices on the same network are working properly to rule out network-wide issues.
  • Make sure your Windows 11 system is up to date with the latest updates installed.

Step 1: Restart Your Computer and Network Devices

Sometimes, a simple restart can fix temporary glitches causing DHCP errors. Restart your PC first.

After that, power off your modem and router. Wait about 30 seconds, then turn them back on. This refreshes your network connection and can resolve conflicts.

Once your devices are back online, check if the DHCP error still occurs.

Step 2: Run the Windows Network Troubleshooter

Windows 11 has a built-in troubleshooter that automatically detects and fixes network problems.

  1. Click on the Start button and select Settings.
  2. Go to System > Troubleshoot > Other troubleshooters.
  3. Find Network Adapter from the list and click Run.
  4. Follow the on-screen instructions to complete the process.

This tool can identify issues related to DHCP and network adapters and attempt to fix them automatically.

Step 3: Restart the DHCP Client Service

The DHCP Client service manages IP address assignments on your computer. Restarting this service can clear errors.

  1. Press Windows + R keys to open the Run dialog box.
  2. Type services.msc and press Enter.
  3. In the Services window, scroll down and locate DHCP Client.
  4. Right-click on it and select Restart.

If the service is not running, right-click and choose Start. Restarting this service refreshes the DHCP functionality on your PC.

Step 4: Reset TCP/IP Stack

The TCP/IP stack controls how your computer communicates over the network. Resetting it can fix configuration issues causing the DHCP error.

  1. Open Command Prompt as an administrator. To do this, click Start, type cmd, right-click Command Prompt, and select Run as administrator.
  2. In the Command Prompt window, type the following commands one by one, pressing Enter after each:
netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns

These commands reset network settings, release and renew your IP address, and clear DNS cache. After running them, restart your computer.

Step 5: Manually Configure IP Settings

If DHCP is failing to assign an IP automatically, you can try setting a static IP address temporarily.

  1. Open Settings and navigate to Network & Internet > Advanced network settings > More network adapter options.
  2. Right-click your active network adapter and select Properties.
  3. Double click on Internet Protocol Version 4 (TCP/IPv4).
  4. Select Use the following IP address and enter the following details (adjusted for your network):
    • IP address: 192.168.1.100
    • Subnet mask: 255.255.255.0
    • Default gateway: 192.168.1.1
  5. Under Use the following DNS server addresses, enter:
    • Preferred: 8.8.8.8
    • Alternate: 8.8.4.4
  6. Click OK to save changes and close all windows.

This method bypasses DHCP temporarily. If your connection works, it indicates a DHCP-related problem needing further attention.

Step 6: Update or Reinstall Network Adapter Drivers

Outdated or corrupted network drivers can cause DHCP errors. Updating or reinstalling them often fixes the issue.

  1. Press Windows + X and select Device Manager.
  2. Expand the Network adapters section.
  3. Right-click your network adapter and choose Update driver.
  4. Select Search automatically for drivers to let Windows find the latest version.
  5. If no updates are found, you can uninstall the driver by right-clicking and selecting Uninstall device, then restart your computer. Windows will reinstall the driver automatically.

Keeping drivers updated ensures compatibility and smooth DHCP operation.

Step 7: Disable IPv6 (Optional Advanced Step)

Sometimes, IPv6 conflicts with DHCP on certain networks. Disabling IPv6 can help troubleshoot connectivity issues.

  1. Go to Settings > Network & Internet > Advanced network settings > More network adapter options.
  2. Right-click your active network adapter and select Properties.
  3. Uncheck the box next to Internet Protocol Version 6 (TCP/IPv6).
  4. Click OK and restart your computer.

If this fixes the problem, you can keep IPv6 disabled or explore further network configuration options.

Frequently Asked Questions (FAQs)

What causes DHCP Error 0x79 on Windows 11?

This error typically arises from issues with the DHCP Client service, network adapter problems, driver conflicts, or network configuration errors.

Can I fix this error without technical knowledge?

Yes, many of the steps provided are simple and user-friendly, such as restarting devices or running the Windows troubleshooter.

Will resetting TCP/IP affect my other network settings?

Resetting TCP/IP restores default network settings but does not delete personal data. You might need to re-enter any custom network configurations afterward.

Is it safe to disable IPv6?

Disabling IPv6 is generally safe for most home networks, but some applications and services rely on it. If unsure, test and revert changes if needed.

How do I know if my network adapter driver is outdated?

If you experience frequent connection issues or error messages, your drivers may be outdated. Using Device Manager to update them is the best way to stay current.

When Nothing Works

If you’ve followed all the steps and still face DHCP Error 0x79, consider the following options:

  • Contact your Internet Service Provider (ISP) to check for network issues on their end.
  • Use the Windows 11 built-in System Restore feature to revert to a previous state before the error appeared.
  • Visit the official Microsoft support page for Windows 11 networking issues: https://support.microsoft.com/en-us/windows
  • If comfortable, perform a network reset from Settings > Network & Internet > Advanced network settings > Network reset. This will remove and reinstall all network adapters and reset settings to default.

Conclusion

DHCP Error 0x79 on Windows 11 can be frustrating, but it is often resolvable through systematic troubleshooting. Starting with simple restarts and the Windows troubleshooter can quickly fix common issues.

If the problem persists, restarting the DHCP Client service, resetting network settings, or updating drivers are effective next steps. Manual IP configuration or disabling IPv6 can help isolate the problem further.

Remember to check your physical connections and router settings as well. If all else fails, official support channels and network reset options provide final solutions.

With patience and the steps outlined here, you can restore your network connection and get back online swiftly.

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