And your personal info thingy under your response, what is a "core contanct freezer"?
If it aint broken, dont fix it, ill remember that ;]
Your MB should come with a driver CD, but the drivers on that CD may already be somewhat out of date. The CD will also usually have a lot of other BS that you may decide you don't really need as well. Personally, I just let the OS find drivers to get going, then download the updated versions from the MB MFG's website.
As far as BIOS updates, read the readme file to see what it is really fixing prior to downloading. If the readme doesn't fix an issue that you have, then leave well enough alone. Many a MB has been fubared with a BIOS flash, sometimes catastrophically...