I just re-installed Windows 10 Pro x64 and I got it all optimized - no 3rd party services, no startup items, none of that. I set to Auto Log-in. When Windows boots up and shows the screen with my e-mail on it, it lasts some 6 seconds or so. I never had that before. In the past it lasted 1 second maximum. What can be the cause? I disabled Cortana too.