Automatic MSI Live Update - BIOS Update, PC won't boot. Black Screen.

Hey guys, now I know I shouldn'd have done a Live Update but well, it is how it is. Maybe you can help me.

I have a MSi MS-7673 Ver: 2.0 Motherboard (that's what is written onto the board), should be a P67A-G45 (B3). It was the Update "7673v54.zip" fro...