The absolute FIRST thing you MUST do before you do ANY BIOS update -- is ensure that you have a way to (1) save off the current WORKING BIOS version and (2) restore this version if the update goes badly. In the case of BIOS versions, newer is NOT necessarily better -- I can confirm this from personal experience when I upgraded my Gigabyte motherboard to a newer BIOS and it crashed. I WAS able to restore it and, after that, Gigabyte actually removed the newer BIOS version from their available updates.
BIOS update is not a miracle cure -- unless there is a specific reason for updating (provides a feature you need, adds compatibility for a new processor version you want to install, fixes a known "bug" you are experiencing in the current version), you really need to leave it alone.