i am a long time user of Ubuntu and this is the first time a such thing happens to me. I usually upgrade from a version to an other, but this time i wish to do a clean install. I want to totally remove my 12.04 and do a clean install of 12.10, i created a live USB then i restarted my computer to boot from USB, i got the following error:

Product is covered by one or more of the following patents: US5,434,872, US5,732,894, (and many more)

Under that i see:

PCIe GBE Family Controller Series v2.38

Media test failiure

Exiting PXE ROM

And then it reboots

I've searched a lot for an answer, i guess the problem is with something in my bios, but i didn't find a fix.

I would really appreciate a fix for my problem. My laptop is a Toshiba p775 dual boot ubuntu 12.04 and windows 7.