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Home » Windows Has Detected An IP Address Conflict? 8 Ways to Fix It (Windows 11/10)

Windows Has Detected An IP Address Conflict? 8 Ways to Fix It (Windows 11/10)

Windows has detected an IP address conflict

The message “Windows has detected an IP address conflict” means that two or more devices on your network are using the same IP address. When this happens, Windows may lose internet access, drop connections, or fail to communicate properly with other devices. In many cases, restarting your router and your PC, or refreshing your IP address, is enough to fix it. If the problem persists, ensure all devices use automatic IP assignment (DHCP) and avoid mixing static and dynamic IP configurations.

In this article, you’ll learn:

  • What an IP address is
  • Why IP address conflicts happen
  • 8 proven ways to fix the error on Windows 11 and Windows 10

What Is an IP Address?

Cisco describes that an IP (Internet Protocol) address is a unique numerical label assigned to every device connected to a network. It acts like a home address for your device on the network.

When your computer, smartphone, printer, or smart TV connects to your Wi‑Fi or local network, each device gets a different IP address. This helps the network:

  • Identify each device individually
  • Route data to the correct destination
  • Allow devices to communicate with each other

If two devices end up with the same IP address, the network can’t tell them apart. This is called an IP address conflict.

What Causes an IP Address Conflict?

An IP address conflict occurs when two devices on the same network share the same IP address. Since every device must have a unique IP address, this duplication disrupts communication and may disconnect you from the internet.

Common reasons include:

  • Static IP Address Assignments: If two devices are manually configured with the same static IP address, they will conflict.
  • DHCP Server Issues: Most home routers use DHCP (Dynamic Host Configuration Protocol) to automatically assign IP addresses. If the DHCP server glitches or is misconfigured, it might assign the same IP address to multiple devices.
  • Network Device Problems: Faulty or misconfigured routers, modems, or switches can cause incorrect IP assignments.
  • Device Wake‑Up Conflicts: If a device goes to sleep and wakes up later while another device has already been assigned its old IP address, Windows may display an IP conflict error.
  • Incorrect Network Configuration: Incorrect network settings on your PC (for example, mixing static and dynamic IP settings) can cause conflicts.
  • Multiple DHCP Servers on the Same Network: If you have more than one device acting as a DHCP server (for example, two routers on the same network), they can both hand out overlapping IP addresses.

How to Fix “Windows Has Detected An IP Address Conflict”

Restart your computer and network device, Release and renew your IP address using the command prompt. This is the best way to fix the problem and restore internet access on Windows 11.

Restart Your Router and Devices

A simple restart often resolves temporary DHCP errors and clears IP conflicts by refreshing IP assignments.

  1. Turn off your router or modem by unplugging it from the power source.
  2. Wait 1–2 minutes for it to fully reset.
  3. Plug it back in and turn it on. Wait until all lights stabilize.
  4. Restart your Windows PC and other devices (phones, laptops, printer) if possible.
  5. Check if the IP address conflict error is gone.

If you still see the error, move on to the next method.

Release and Renew Your IP Address (Command Prompt)

If your PC is holding on to an IP address that conflicts with another device, you can reset the network configuration and force Windows to request a new IP address from the router.

Let’s reset the network configuration to its default settings and force your Windows PC to request a new IP address from the DHCP server (modem/router).

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  • Press Windows + S, type cmd.
  • Right‑click Command Prompt and select Run as administrator.
  • In the Command Prompt window, run these commands one by one, pressing Enter after each:
  • netsh int ip reset c:\resetlog.txt
  • ipconfig /release
  • ipconfig /flushdns
  • ipconfig /renew
What these command does:

netsh int ip reset resets TCP/IP settings to their default values.

ipconfig /release drops the current IP address.

ipconfig /flushdns clears the DNS cache.

ipconfig /renew asks the DHCP server (your router) for a fresh IP.

After that, reboot your Windows computer and test again if the error is still there or gone.

Obtain an IP Address Automatically from DHCP

If your PC is using a static IP address that conflicts with another device, switch it back to automatic IP (DHCP). You can Learn more about how DHCP assigns IP addresses on a network in this article from CloudDNS.

  1. Press Windows + R, type ncpa.cpl, and press Enter to open Network Connections.
  2. Right‑click your active network adapter (Wi‑Fi or Ethernet) and choose Properties.
  3. Double‑click Internet Protocol Version 4 (TCP/IPv4).
  4. Select:
    • Obtain an IP address automatically
    • Obtain DNS server address automatically
  5. Click OK, then Close all windows.
  6. Restart your PC and test your internet connection.

If you still get the error, try assigning a new static IP that doesn’t conflict.

Obtain IP address Automatically

Assign a Unique Static IP Address (Optional)

If automatic settings don’t help or you prefer a fixed IP (for example, for printers or specific PCs), you can manually set a unique static IP that matches your router’s network.

  1. Press Windows + R, type ncpa.cpl, and press Enter.
  2. In Network Connections, right‑click your active adapter and choose Properties.
  3. Double‑click Internet Protocol Version 4 (TCP/IPv4).
  4. Select Use the following IP address and fill in the details according to your router’s network. Example for a router using 192.168.1.1:
    • IP address: 192.168.1.111 (choose a number not used by other devices)Subnet mask: 255.255.255.0Default gateway: 192.168.1.1 (your router’s IP)
    For DNS, you can use Google DNS:
    • Preferred DNS server: 8.8.8.8Alternate DNS server: 8.8.4.4
    Important: If your router uses a different range, for example 192.168.0.1, then your static IP must match that pattern, such as 192.168.0.111. Otherwise, your PC won’t be able to connect to the network.
  5. Click OK, then restart your computer.
  6. Check if you can now connect to the network and internet without the IP conflict error.
Configure DNS address manually

Run the Network Adapter Troubleshooter

If you still receive the error after resetting or changing your IP, let Windows automatically detect and fix network adapter problems.

  1. Press Windows + I to open Settings.
    • Windows 11: Go to System > Troubleshoot > Other troubleshooters.
    • Windows 10: Go to Update & Security > Troubleshoot > Additional troubleshooters.
  2. Find the Network Adapter in the list.
  3. Select it and click Run the troubleshooter.
  4. Follow the on‑screen instructions. Windows will:
    • Check the adapter for errors
    • Reset it if needed
    • Look for driver or configuration issues
  5. When the troubleshooting finishes, restart your PC.
Network Adapter troubleshooter

Tip: After running the troubleshooter, it’s a good idea to run the IP release/renew commands again (see Method 2) and then test your connection.

Disable IPv6 (Temporary Test)

Some users report that disabling IPv6 on their adapter helps resolve the IP conflict error. This is more of a troubleshooting step than a permanent requirement, but you can try it.

  1. Press Windows + R, type ncpa.cpl, and press Enter.
  2. Right‑click your active network adapter and select Properties.
  3. In the list, find Internet Protocol Version 6 (TCP/IPv6).
  4. Uncheck the box next to it.
  5. Click OK to apply the changes.
  6. Restart Windows and check if the “Windows has detected an IP address conflict” error is gone.
disable IPv6

If it doesn’t help, you can come back and re‑enable IPv6.

Update Your Router Firmware

Outdated or buggy router firmware can cause DHCP issues, which in turn can lead to IP conflicts.

  1. Note down your router brand and model (usually printed on a label on the router).
  2. Visit the official website of your router manufacturer.
  3. Go to the Support / Downloads / Firmware section and search for your model.
  4. Download the latest firmware file if a newer version is available.
  5. Open a browser and log in to your router’s admin interface (commonly 192.168.1.1 or 192.168.0.1).
  6. Navigate to Firmware Update, System Tools, or Advanced Settings (depending on the brand).
  7. Upload the firmware file and follow the on‑screen instructions to complete the update.
  8. After updating, restart the router and check whether the IP conflict issue is resolved.

Note: Do not power off the router while the firmware update is in progress, as that can damage the device.

Reset Network Settings in Windows 11/10

If none of the above methods work, there might be a deeper configuration problem in Windows. Resetting network settings restores all network components to their defaults.

  • Open Settings.
    • Windows 11: Go to Settings > Network & Internet > Advanced network settings > Network reset.
    • Windows 10: Go to Settings > Network & Internet > Status > Network reset.
Reset Network Settings windows 11
  • Click Network reset.
  • Click Reset now and confirm when prompted.
  • Windows will restart your PC. After restart:
    • Reconnect to your Wi‑Fi network (you may need to re‑enter the Wi‑Fi password).
    • Check if the IP address conflict error is gone.

If you have multiple devices acting as DHCP servers (for example, a second router, range extender running as a router, or a NAS with DHCP enabled), make sure only one DHCP server is active on your network.

How to Prevent IP Address Conflicts in the Future

Once you’ve fixed the IP address conflict error on Windows 11/10, it’s a good idea to prevent it from happening again.

  • Use automatic IP (DHCP) for most devices: Let the router assign IP addresses automatically unless you have a specific reason to use static IPs.
  • Avoid duplicate static IPs: If you must use static IPs, keep a simple list and make sure each device has a unique address within your router’s IP range.
  • Keep router firmware updated: New firmware versions often fix DHCP and stability issues that can trigger conflicts.
  • Check for multiple DHCP servers: Ensure that only your main router is running a DHCP server. Turn off DHCP on any extra routers or network devices.
  • Restart devices after major changes: If you change IP settings or replace your router, restarting PCs and network devices helps them get clean IP assignments.

Following these practices reduces the chances of seeing “Windows has detected an IP address conflict” on Windows 11 or Windows 10 again.

Frequently Asked Questions

What does “Windows has detected an IP address conflict” mean?

It means that at least two devices on the same network are using the same IP address, so Windows can’t tell them apart. This usually results in internet disconnections or trouble accessing other devices on the network.

Is an IP address conflict dangerous?

No, an IP conflict isn’t dangerous to your data or hardware, but it can interrupt your internet connection and cause network instability until it’s fixed.

What is the quickest way to fix an IP address conflict in Windows?

The fastest fix is to restart your router and PC, then run ipconfig /release and ipconfig /renew In an elevated Command Prompt, to get a fresh IP from the router.

Can IP address conflicts happen on Wi‑Fi and Ethernet?

Yes, IP conflicts can occur on any network connection type, including Wi‑Fi, wired Ethernet, and even virtual adapters, as long as devices are on the same network and share an IP.

Should I use static or automatic IP to avoid conflicts?

For most users, using automatic IP (DHCP) is the safest option. Use static IPs only if needed and make sure each static address is unique and matches your router’s IP range.

Robeg

I am Robeg founder of this blog. My qualification. completed Bachelor of Arts (BA) and Microsoft Certified Professional (MCP). With a strong background in computer applications love write articles on Microsoft Windows (11, 10, etc.) Cybersecurity, WordPress and more.

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