NoVirusThanks MAC Address Changer is an extremely easy-to-use tool for changing (spoofing) the MAC address of your network adapters.
The program employs a simple UI that allows you to easily pick the network adapter, and then click the change MAC and enter a new MAC Address, or allow the program to provide a randomized one that will be properly formatted to cut confusion.
One of the most common reason to change a specific MAC address is simply for your privacy. Pretty much anyone can view such information on the local Ethernet network using the numerous tools that are out there. Someone out to do bad things has the potential to be able to track you and your machine - which becomes a real issue when you are using public or open Wi-Fi.
If the MAC Address cannot be changed, make sure to adjust the new MAC Address because some network adapters accepts only specific ranges. This is a small but effective network tool that should be present in every security professionals tool box.