How to fix “Windows has detected an IP address conflict” error on Windows?

by Olivia Morelli - -
12

Question

Issue: How to fix “Windows has detected an IP address conflict” error on Windows?

Hello. A couple of days ago I’ve started receiving an error, which claims that “IP address conflict Network Error – Another computer on this network has the same IP address as this computer.” I understand that the problem is related to the Internet connection, but since I’m not tech-savvy, I have no idea what should I do to fix that. I use Windows 10 1703, which is connected to the Internet using Ethernet port if that makes sense. Thanks in advance!

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Solved Answer

“Windows has detected an IP address conflict” is an Internet connection error, which strikes PCs and laptops, which are connected to the Internet using Ethernet cable. Since now, none of the Windows users who use Wi-Fi router contacted us or reported about this issue on IT forums and, actually, they should not face this problem. The “Windows has detected an IP address conflict” error occurs only if people are using one Ethernet cable to connect one or several devices.

showing “Windows has detected an IP address conflict” error message

When the direct connection using a cable is established, the Internet connection requires entering the IP address, default gateway, preferred DNS server, Subnet mask, and alternate DNS server. All the processes information is registered as the current Media Access Control (MAC) address and is tied to the currently connected device. Therefore, if the computer with the registered MAC address is disconnected and the other device is connected to the same Ethernet cable, the network fails to recognize the MAC address of the other computer. If this kind of IP conflict emerges, the user is notified with the following message:

Windows has detected an IP address conflict
Another computer on this network has the same IP address as this computer. Contact your network administrator for help resolving this issue. More details are available in the Windows System event log.

Fixing the “Windows has detected an IP address conflict” error on Windows

The error should no longer occur if you switch back to the PC, which MAC address has been registered by your network. If that’s not the solution because you need two or more devices to be connected to the same Ethernet cable, then you should try these “Windows has detected an IP address conflict” fixes:

Method 1. Change MAC address

To fix the problem, you’ll have to use the same MAC address on the second device connected to the network. For this purpose, you should:

  1. Right-click on Windows key and select Command Prompt (Admin).
  2. OR press Windows key + R, type cmd, and press Enter.
  3. Copy and paste the ipconfig /all command.
  4. Press Enter after it.
  5. When the Physical Address opens, open the second PC.
  6. Press Windows key + R, type ncpa.cpl, and press Enter.
  7. Right-click on the Ethernet [number] and open Properties.
  8. Select Configure and then open Advanced.
  9. Click on Network Address and enter the MAC address in the Value box.
  10. Save the changes

Method 2. Renew IP address

  1. Right-click on Windows key and select Command Prompt (Admin).
  2. OR press Windows key + R, type cmd, and press Enter.
  3. Copy and paste the following commands in the Command Prompt windows and hit Enter after each:
    ipconfig /release
    ipconfig /renew

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