You don't need to, my friend. Windows OS automatically installs all the necessary drivers for the smooth functioning of the system.
I've heard sometimes, more often than not, WU drivers are defective or problematic in the past, don't know nowadays.
WU drivers are generally OK or just the same as the OEM ones. Few Intel or Nvidia cards may be exceptions It's usually also a good idea to install W7/8/8.1 WIFI drivers instead of bundled ones https://forums.mydigitallife.net/threads/msmg-toolkit.50572/page-1295#post-1796508
Yes The drivers that are incuded on the installation disc (which are 90%~100% of the drivers you see in device manager after a fresh install, the the other 10% comes from WU)