|While theoretically possible it is highly unlikely that the BIOS is infected by malware. The infection would have to target a BIOS that was very similar to yours. Flashing a BIOS carries with it an element of risk. If anything goes wrong, which can happen even if you do everything right, your system could become unbootable. In many cases the only recovery is physical replacement of the BIOS chip.|
You should consider a BIOS infection a last resort.