I would suggest you to check it again because, we do have “Tunnel adapter Local Area Connection” listed but with Physical Address: 00-00-00-00-00-00-00-E0.
I have checked several computers with it.
Tunnel adapter Local Area Connection is meant for IPv6 configuration.
Anyhow, to remove “Tunnel adapter Local Area Connection” and consequently the Physical Address: 00-00-00-00-00-00-00-E0 from ipconfig /all
1. Click Start, type cmd in the “Start Search” box, right click the cmd.exe, and then click Run as Administrator.
2. In the Command Prompt, type netsh int isa set state disabled, and press Enter.
I just spent six weeks with same issue. I believe a vista update or virus did something to the reported mac address of the network card as it should not be all zeros. Could not find any way to change until I came across a post suggesting to download freeware Technitium which will overwrite the mac address in the registry. ( back up first in case of problems). I also have HP with Nvidia NIC running vista home premium. ISP eas no help. HP could not figure it out even when I told them about the physical address issue. All now working fine.
In regards to the Tunnel adapter Local Area Connection this has something to do with IPV6. I had tried that command on my Windows 7 system but it did not work. Since I am on a lot of different networks i have a lot of Tunnel adapter Local Area Connection entries which cause CMD to have buffer overflow cutting off the top part of the "ipconfig /all" command that listed the MAC address.
So what I did is turn off IPV6 and rebooted my computer. After I did that it cleared out most of theTunnel adapter Local Area Connection entries to stop CMD from having buffer overflow so I could get the MAC address for my network card.
Here is the link to turn off IPV6 in Windows Vista and Windows 7 if you need it.
Also here is the link to my whole process in getting your MAC address with a screen shot of what you should see after you run the "ipconfig /all" command.