General

Win7 MAC Address Changer v2.0
SMAC 2.0
How to change your MAC Address in Windows 7 Registry

HKEY_LOCAL_MACHINE
SYSTEM
ControlSet001
Control
Class
{4D36E972-E325-11CE-BFC1-08002BE10318}
String: NetworkAddress = 12DEADFACE21

WiFi

How Can I Change the MAC Address for My Wireless Adapter? => you can’t!!
Changed MAC address of Wireless card being ignored?
Connect to Wi-Fi access point with specific MAC address