With Hello enabled, logging in to the machine is as simple as sitting down in front of it. The lock screen shows the Windows Hello “eye” looking around, and the detection is near-instantaneous. It takes longer for Windows to dismiss the lock screen and show the desktop than it does for it to recognize you in the first place. In fact, it’s so quick that a kind of delay had to be built in. If there were no delay, locking your PC with Windows+L (or the Start menu option) would be nigh impossible.