Your system BIOS is software, but updating it regularly may not be appropriate. Updating it to fix a bug, of course, would be.
BIOS
How do I boot from CD/DVD?
Most computers with a CD or DVD drive can boot from that drive, but it frequently takes a small configuration change in the computer’s BIOS.
Are Humans Getting More Stupid Because of Computers?
Computers make many things easier. Personally, I can do and be more than ever before. It’s because I allow the technology to help with many of the things that I used to have to remember or know… freeing up my time for other things.