(adsbygoogle = window.adsbygoogle || []).push({}); There might be a time when you want to change the MAC-address of your network adapter. The MAC-address (Media Access Control address)is a unique identifier which is used to identify your computer in a network. (e.g. an ip-address is assigned to your MAC-address)

Run the registry editor regedit (C: \windows\system32\regedit.exe)
You must login or register to view this content.

Go to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\Cl ass\{4D36E972-E325-11CE-BFC1-08002BE10318}
Now find your adapter in the 4-digit list in this entry. You can use the DriverDesc entry to identify your adapter.
You must login or register to view this content.

Add a new string entry to your adapter entry called 'Networkaddress' (the one with 4 digits)
You must login or register to view this content.

Use a HEX MAC-address without -'s or :'s as a value for the entry, so if your MAC-address is 'E:AD :BE:EF:CA:FE', you should enter DEADBEEFCAFE.
You must login or register to view this content.

Some adapters (especially WiFi cards) are unforgiving of MAC addresses changes if the first octet's 2nd half isn't a 2,6,A,E or begins with a zero. This requirement has been observed as far back as Windows XP and is formatted as:

1. D2XXXXXXXXXX
   
2. D6XXXXXXXXXX
   
3. DAXXXXXXXXXX
   
4. DEXXXXXXXXXX
   
5. etc..
   

You can also disable and re-enable your adapter within Windows for the change to become effective without rebooting. Just sliding the WiFi's On/Off switch like the slider found on ThinkPad's and VaiO's won't satisfactorily disable/re-enable the card.



Tips

• You can also have funny MAC-addresses names because hexadecimal numbers use the letters A-F
  
• Don't use a MAC-address which is already in use, as this will prevent one of the machines from connecting to the network.