I would turn off unnecessary background programs like anti-virus and applications to be safe.
Well if you flash in DOS like you should you don't need to worry about that
Gaara - it really doesn't add any noticeable stability unless they've made insane changes. If his system is already working fine and he's not overclocking it, he really doesn't need to change it. Even if he was overclocking it, generally upgrading to a newer manufacturer BIOS still won't do much.
Like I said if your system is running like it should, don't bother with it. I did write an article here about BIOS flashing and recovery if one goes wrong and how to hot flash (scary process lol) just click the 'computer articles' link.