I've been using Windows 10 now for about a year (on a real late 2013 PC. I have Windows 7 on my MBP via bootcamp). It's among the best Windows I've used (I've used them all since the 90s), but on occasion it has this annoying habit of not starting up (the computer is running), a black screen appears followed by a no signal message (indicating the monitor is not getting anything from the computer (said for the novices
). I hold the start button until it shuts down, restart it again, nothing, do it again, and this time I get a message about troubleshooting. If I used advanced troubleshooting to repair my PC typically it can't find anything to repair and when I tell it to exit and continue to Windows, then magically it starts up to the log in screen.
Really good.
It's not happening every week, but it happens often enough it annoys me, say once a month. Then it goes away for a while, then returns. Anyone have an idea what might cause this? Just say that's Windows for ya. 
Really good.