This is an unusual request for help.
I have Asus A8N-SLI motherboard and up until yesterday the BIOS rev was 1016
and I had no problems. Looked on the Asus site and found there was an update
to 1805 beta.
I installed this latest version using the updater and the BIOS was duly installed on the CMOS.
Xpro/SP2 and all programs ran OK but in BIOS setup I cannot find "boot from keyboard or space bar" which existed in 1016
So I tried to return to 1016 but this cannot be done using the updater. I have emailed Asus but have no reply, so you geniuses please helt a 73 year old geriatric