You cannot change the MAC address while the interface is "Up." You must disable the adapter or disconnect from the Wi-Fi before applying the change. AI responses may include mistakes. Learn more
Examples:
Your Wi-Fi connection will temporarily disconnect and reconnect. You cannot change the MAC address while the interface is "Up
The first octet of a locally administered MAC address must be in the form of x2 , x6 , xA , or xE in hexadecimal (where x is any hex digit). Acceptable examples: 02 , 06 , 0A , 0E , 12 , 16 , 1A , 1E , 22 , 26 , 2A , 2E , etc.
If you are using a tool like Technitium MAC Address Changer or the Windows Device Manager, follow these steps: The first octet of a locally administered MAC
This in-depth guide will first explain exactly what this error means and the technical reason it occurs. Then, it will explore several practical solutions, from simple workarounds to more advanced ones, and will also address the limitations specific to various network hardware manufacturers.
3 Ways to Change a Computer's MAC Address in Windows - wikiHow 30 Dec 2025 — Then, it will explore several practical solutions, from
Windows has a built-in "Random Hardware Addresses" feature. If this is toggled "On" in your Wi-Fi settings, it may conflict with your manual attempt to set a static spoofed address. Ensure this is turned off before applying your own. 3. Registry Permissions
How to Fix "Failed to Change MAC Address" for Wireless Connections: The First Octet Rule