Please post a screenshot so we could se better the texture problem that you have.
Please understand that WoW currently has some driver
issues too, so it could be with WoW itself and not your drivers
Also, make sure under Options->Advanced on your WoW options it's under DX9 not DX11.
If you have nVidia control panel, check if Ambient Occlusion on WoW is set to on. If it is, it should be off.