Network · medium

How to fixMAC-CONFLICT

Physical MAC address conflict in network

What this error means

Physical MAC address conflict in network (MAC-CONFLICT) is a medium-severity fault affecting the network adapter. Two devices on the network share the same physical MAC address. It's most often caused by ISP Provider Error and stuck Router. Work through the steps below in order.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Restart the router (turn off for 1 minute)

Restart the router (turn off for 1 minute).

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Reset complete network settings in Windows

Reset complete network settings in Windows.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Change the DNS servers to 8.8.8.8

Change the DNS servers to 8.8.8.8.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • ISP Provider Error
  • Corrupt network card driver
  • Stuck Router
  • IP address conflict