Got the new Windows 10 Anniversary update, downloaded and installed it. I was able to log in using my usual password. Then the keyboard went completely dead. Could not type anything anywhere after the log in screen. Shut down and rebooted - same thing. Blue light is on the keyboard, but all keys non-functioning. Had to restore back to previous version and keyboard is working correctly as nit should be. Will not update to the Anniversary release again until this bug has been fixed.