No internet, no Mac adress After BIOS flash [SOLVED]

[XtraGames]

So I flashed a custom BIOS for my Vostro 200 trying to be able to overclock it's Core 2 Dúo (which by the way, the oc feature doesn't seem to work), so using winflash I selected update all (it's my first time updating a BIOS).

The BIOS installed correctly, but when I booted into Windows I saw I had internet connection problems. It says it has problems with the IP address, and I did a IP config /all in cmd and found out the Mac Address is something like FFFF-FFFF-FFFF-FFFF

So, do you guys know how to fix it? Sadly I don't have a backup of the stock bios.

Thanks in advance.


EDIT:

I'm glad I can say I solved this by myself after lots of research:

After trying to edit DMI without any results, I got a Mac Spoofer program which was able to change the MAC adress of the adapter and got internet working again on the computer, you have to install this: https://technitium.com/tmac/

Then, you select the Ethernet connection (usually is the only one, but in my case I had some VMWare connections), then down on Change Mac Adress you click on Randomize Mac Adress, and then on Change Now!

And done, internet working again!