What is MAC-CONFLICT?
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.
Common Causes
- ISP Provider Error
- Corrupt network card driver
- Stuck Router
- IP address conflict
Step-by-Step Fix Guide
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1
Restart the router (turn off for 1 minute)
As a first move, Restart the router (turn off for 1 minute) handles the most common scenario behind MAC-CONFLICT.
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2
Reset complete network settings in Windows
A recurrence usually points to a rarer network instability cause, which is what the following steps are meant to catch.
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3
Change the DNS servers to 8.8.8.8
For lingering MAC-CONFLICT cases, "Change the DNS servers to 8.8.8.8" is worth running through.
Commands & Diagnostics
ipconfig /release
ipconfig /renew
ipconfig /flushdns
netsh winsock reset
Frequently Asked Questions
MAC-CONFLICT is most often triggered by ISP Provider Error. Other reports point to corrupt network card driver, stuck Router and IP address conflict as contributing factors.
"Restart the router (turn off for 1 minute)" clears up most MAC-CONFLICT reports by itself. The remaining steps above cover what's left.
As a medium-severity issue, MAC-CONFLICT is more of a stability annoyance than a hardware risk — the steps above should clear it up.
In most cases, yes — the guide above resolves MAC-CONFLICT without a clean install. Treat a reinstall as the last resort, not the first move.
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