1. Boot in the recovery Windows configuration without network initialized.
2. Win+R, run regedit.exe
3. Locate the network adapter configuration that was configured with the random mac address feature in
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}
The network adapter maker's name can suggest the proper subfolder of {4D36E972-E325-11CE-BFC1-08002BE10318}.
4. Right-click on the folder that matches your device. For example, if the "0001" folder matches your device, right-click on the folder. Select New → String Value. Name the new value "NetworkAddress".
5. Double-click the new Network Address entry. In the "Value data" field, enter your new MAC address. MAC addresses are 12-digit values, and should be entered without any dashes or colons. For example, if you want to make the MAC address "2A:1B:4C:3D:6E:5F", you would enter "2A1B4C3D6E5F" (see the detailed instructions in
3 Ways to Change a Computer's Mac Address in Windows)
6. Restart the computer. You will notice in the wifi adapter advanced configuration settings that the random mac address option is greyed out.