Since there's a lot of drivers, for motherboard, chipsets, audio, keyboard, SATA, processor, etc., how to know all the drivers I need? PC works great with only the video drivers, even sound's 5.1, keyboard, monitor, mouse, everything works great with any games or software I've ever used. Honestly I don't even get WHY I need the drivers.
If you run older (or compatible) hardware, Windows already has all the drivers. You only need driver, if you get the yellow exclamation mark in device management. Remember: never touch a running system!