-In able to successfully change our mac we need our telnet to be activated.
Press —> window+R
Type —> cmd
Type —> telnet 192.168.1.1
If you’re able to enter the login phase then your telnet is activated if not then do the following for Win7:
—> Control Panel
—> Programs And Features
—> Turn Windows features on or off
—> Check Telnet Client
—> Hit OK
and now you are ready to change your mac address. click here for tutorial.