How can I change my media access control (MAC) address under Windows NT 4.0?

A. Each network adapter card has a MAC address, which machines on local subnets use to talk to each other. MAC addresses are usually burned into the adapters during the manufacturing process. To overwrite a network adapter card's default MAC address, perform the following steps:

  1. Start the registry editor (e.g., regedit.exe).
  2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\<network adapter>\Parameters.
  3. From the Edit menu, select New - String Value.
  4. Type a name of NetworkAddress, and press Enter.
  5. Double-click the new value, and enter the adapter's new MAC value.
  6. Click OK.
  7. Close the registry editor.
  8. Reboot the machine.
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