How to Fix an IP Address Conflict in Windows 11

An IP address conflict occurs when two devices on the same network are assigned the same IP address, causing one or both to lose connectivity. This guide shows you how to resolve it in Windows 11 by releasing and renewing your IP configuration, restarting your router, and manually setting a static IP if needed.

What You’ll Need

Administrator access to your Windows 11 PC (to run Command Prompt or PowerShell as admin).
Access to your router’s admin page (usually via a web browser, with the router’s IP address and login credentials).
Your network name (SSID) and password if you need to reconnect to Wi-Fi.

Step-by-Step

Identify the conflict. You’ll often see a notification: “Windows has detected an IP address conflict.” Or you may lose internet access. To confirm, open Command Prompt (type cmd in the Start menu) and run ipconfig. Look for an IP address that starts with 169.254. – that means Windows couldn’t get a proper IP. Also, run arp -a to see all IPs on your network; if two devices show the same IP, you’ve found the conflict.
Release the current IP. Right-click the Start button, select “Terminal (Admin)” or “Command Prompt (Admin)”. Type ipconfig /release and press Enter. This drops your current IP address.
Renew the IP. In the same window, type ipconfig /renew and press Enter. This asks the DHCP server (usually your router) for a new IP. Wait a few seconds. If you get a valid IP (not 169.254.x.x), you’re done. If not, continue.
Flush and reset DNS (optional but helpful). Type ipconfig /flushdns and then netsh int ip reset. Restart your PC after this.
Restart your router. Unplug the power from your router (and modem if separate). Wait 30 seconds, then plug it back in. Wait for the lights to stabilize (usually 1-2 minutes). This clears the router’s DHCP table, which often holds the conflicting entry.
Reconnect to your network. After the router restarts, reconnect your PC to Wi-Fi or Ethernet. If you used a wired connection, unplug and replug the Ethernet cable.
Set a static IP (if the conflict persists). If you keep getting the same conflict, you can manually assign a unique IP. Go to Settings > Network & Internet > Wi-Fi (or Ethernet) > click on your connected network > Edit next to “IP assignment”. Change it to “Manual”, turn on IPv4, and enter an IP address that is outside your router’s DHCP range (e.g., if your router uses 192.168.1.1-192.168.1.100, use 192.168.1.150). Set the subnet mask to 255.255.255.0 and the gateway to your router’s IP (usually 192.168.1.1 or 192.168.0.1). You can also set a preferred DNS like 8.8.8.8. Save and test your connection.
Update your network driver (if all else fails). Go to Device Manager (right-click Start > Device Manager), expand “Network adapters”, right-click your network adapter, select “Update driver”, and choose “Search automatically for drivers”. Restart after updating.

Common Mistakes

Skipping the router restart. The router’s DHCP server may keep assigning the same IP to two devices until it’s rebooted.
Using the wrong command prompt. You must run the commands as administrator; otherwise, ipconfig /release and /renew will fail with “The requested operation requires elevation.”
Setting a static IP that’s still in the DHCP range. This can cause another conflict if the router assigns that IP to another device. Always pick an IP outside the DHCP range.
Not checking other devices. The conflict may be between your PC and a phone, printer, or another computer. Check your router’s connected devices list to see which ones have the same IP.

Tips

Use a different IP for your PC. If you set a static IP, make sure it’s unique and not used by anything else. You can check by pinging the IP from another device: ping 192.168.1.150 – if you get a reply, that IP is taken.
Enable DHCP again if you don’t need static. After fixing the conflict, you can switch back to automatic IP assignment to avoid future issues.
Keep your network drivers updated. Outdated drivers can cause DHCP problems.
Use a network scanner tool. Apps like Angry IP Scanner (free) can show all IPs in use on your network, helping you spot duplicates quickly.

Troubleshooting

If the steps above don’t resolve the conflict:

Check if the conflict is on a different device. If your PC is fine but another device (like a printer) shows the conflict, you’ll need to fix that device. Check its network settings or restart it.
Disable and re-enable your network adapter. In Device Manager, right-click your adapter and select “Disable device”, then “Enable device”. This forces Windows to re-obtain an IP.
Run the Windows Network Troubleshooter. Go to Settings > System > Troubleshoot > Other troubleshooters > Network Adapter. Run it and follow the prompts.
Check your router’s DHCP settings. Log into your router and see if the DHCP range is too small. For example, if you have many devices, the router may run out of addresses. Increase the range (e.g., from 192.168.1.100 to 192.168.1.200) or reduce the lease time.
Reset Windows network stack. In an elevated Command Prompt, run netsh winsock reset and netsh int ip reset, then restart your PC. This clears all network settings to default.
Check for a rogue DHCP server. If you have a second router or a device with DHCP enabled, it might be handing out conflicting IPs. Make sure only your main router is acting as a DHCP server.

Frequently Asked Questions

What causes an IP address conflict?

It happens when two devices on the same network are assigned the same IP address. This can occur due to a misconfigured static IP, a DHCP server error, or a device that was previously offline reconnecting with an old IP.

Can I fix an IP conflict without restarting my router?

Yes, you can try releasing and renewing your IP, or setting a static IP. But restarting the router is often the quickest fix because it clears the DHCP table.

How do I know if I have an IP conflict?

Windows will show a notification, and you may lose internet access. Running ipconfig and seeing an IP starting with 169.254 indicates a problem, as does seeing the same IP on two devices via arp -a.

Is it safe to set a static IP address?

Yes, as long as you choose an IP that is not in the DHCP range and is not used by another device. It’s a common practice for printers, servers, and other devices that need a fixed address.

Will resetting Windows network settings delete my files?

No, it only resets network-related settings like IP configuration, DNS cache, and firewall rules. Your personal files are untouched.

Why does my IP conflict keep coming back?

If it reappears, there’s likely a device on your network with a static IP that overlaps with the DHCP range, or your router’s DHCP range is too small. Check all devices for static IPs and adjust your router’s settings.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →