Video drivers should NEVER be installed until ALL motherboard drivers have been completely uninstalled/reinstalled and verified.
Not everyone who reads this thread is gonna be an expert, so a warning needs to accompany it methinks.
I can just see a bunch of guys doing a format after the above advice, or just totally losing performance after wiping out the mainboard drivers and not knowing where, what or even realising they need to install mobo drivers.
I tried using driver cleaner for about a year, it caused me re-formats, so I dumped it. It may have a place, but not in my pc. I've always resolved issues without it.
I usually just install a driver over the top of everything, though I sometimes uninstall the driver to be replaced first. (When I remember before clicking the new driver install!)
It always seems to work ok. And, yes, I can hear you screaming, but I don't care, it works when I do it.
The average Joe is gonna make a mess of his PC if he starts messing about with drivers. Unless there is a real problem with your display, best to leave it alone.
Despite contrary opinion, even at the corporate level, with software titles stating the requirements of the "latest" video drivers............ I always find there is an "old" driver somewhere that works better than any of them. I'm still using nv43.51 for my TI4200 and it rocks for what it is.
A good reason to update a video driver would be a known driver fix for an issue with a particular piece of software you want to use. (like flourescent colors on textures for instance).
Driver updating for performance gains is a dubious exercise at best, with very small gains ever realised, and usually resulting in some other issue to offset your success, even if you did get 1 more frame per second out of the update.
Don't un-install your mainboard drivers unless you know what they all are and exactly where you have backup install programs for them. Typically, people misplace them after first installing their pc's, then they are forgotten.