I don't know about you but I would say don't worry about it. I mean unless you are having issues with current drivers, then why update? Sure, perhaps video drivers for gaming rigs could warrant obsessive updating, but really who cares what obscure bug was fixed in your card reader so it can read the bible in greek... Windows update will take care of significant driver updates for the most part.
Looking for drivers see:
1. Manufacturor's site... They might even have a mailing list. Don't know what you have? Speccy