Unless you're using beta drivers or your current drivers are giving you issues, just install over it. You most likely won't have any issues. If you do, just uninstall and reinstall. There's no major risk, really.
Intel Core i5 4670K @4.2GHz, Asrock Z87 Pro3, MSI GTX 970 Gaming "4G" @1470MHz-1499.8MHz (trololo), 16GB DDR3, Corsair TX650, Cooler Master Hyper 212 EVO, Crucial MX100 256GB, WD Blue 1TB, Fractal Design Arc Midi R2, Corsair Gaming K70 (non-RGB) MX Blue