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, Asrock Z87 Pro3, Powercolor PCS+ AMD Radeon HD 7950, Team Dark DDR3 8GB, Corsair TX650, Cooler Master Hyper 212 EVO, Fractal Design Arc Midi R2