I'm on windows 10 64bit, on an intel i7-4770, with an R9 200 series. My computer worked fine until I restarted with the upgrade just a few minutes ago, and now everything seems to be in super slow mo. Every animation from the start menu to anything else takes 6+ seconds to complete. Opening a new window takes forever. The computer is working, just working like it's in Harrison Bergeron world. Even the new tab animation on Firefox takes 4 seconds. Scrolling is a nightmare, with over scrolling taking over my life.