Solution 1 (Easiest)
1. Download Etherchange from http://ntsecurity.nu/toolbox/etherchange/
2. Save the downloaded file to C: (root)
2. Click on START>RUN then type ‘cmd’ (without quotes) and press ENTER
3. In the dos window, type
cd\
etherchange
(Press enter after each line)
4. The etherchange program will start. It’ll ask you to choose which network adapter you want to change, press the number of the corresponding network adapter and press enter
5. Press ‘1’ to specify a new Ethernet address
6. Enter the new MAC address in this format “080007A92BFC”
7. Etherchange should advice you that the change was successful and that you need to either disable and then enable the network adapter or restart your pc for the new MAC address to work
Solution 2
1. Click START>RUN then type ‘regedt32’ (without quotes) and press ENTER
2. Go to
"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contr ol\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}".
3. Double click on it to expand the tree. The subkeys are 4-digit numbers, which represent particular network adapters. You should see it starts with 0000, then 0001, 0002, 0003 and so on.
4. Find the interface you want by searching for the proper "DriverDesc" key.
5. Edit the string key "NetworkAddress" to contain the new MAC address.
6. If the string key "NetworkAddress" doesnt exist, make one. It has has the data type "REG_SZ".
7. Disable then re-enable the network interface that you changed or reboot the system.