update programs are comfort-ware and best and snake oil at worst. Windows Update for drivers
should only be used as a last resort if you can't find the necessary one(s) from the hardware/device manufacturer.
As far as updating drivers goes, ideally the only drivers that should need to be updated not counting external peripherals (mouse, keyboard, printer, etc), are video and sound. System drivers should be left alone unless an update has a fix in it for a problem you may be experiencing.