Or please refer following steps to re-write MAC address under Windows® Vista™.
Step1: Check MAC address.
When system boot up, press "F2" to enter BIOS setting.
Boot-> "Boot settings Configuration" -> set "Boot From Onboard LAN" to "enable".
Press "F10". System will restart.
Please "F11" and select "NVIDIA Boot Agent".
Then you will see MAC address, pls. record it with no space for later usage.
Step2: Boot system into Window Vista
Right click "Computer" and click "Properties"
Click "Device Manager"
Right click "Networking Controller" and click "Properties".
Choose "Network Address" in "Advanced " folder.
Write "MAC Address" which got from step1 into Value item.
Then click "OK".