Hi and Welcome![quote=tiago1982;2217405]Hi all, I wanted to know if I can change my ASUS MOBO software/BIOS from Fujitsu simens back to ASUS,[/quote]OEM mainboards may have slight differences in hardware (mainly to cut costs).
That means, the retail Bios does not perfectly fit to the hardware present. And this might cause trouble. To avoid this, Bios flash routines are protected by checksums and similar mechanisms, so you normally can’t flash a retail Bios onto an OEM Mainboard.
You might try, but this is on your own risk. Worst case, you will kill your motherboard.