can you provide a little more info about your system? is it a store bought system or custom built? if it is store bought you can go to the manufacturers website (i.e. HP, Dell) and find updated drivers there most of the time other wise you will need to know what hardware you have in your system and goto the respected hardware manufacturers website and get the drivers.
Windows update will sometimes have updated drivers as well but are usually behind in having the latest version.
hope this helps.