I am having a similar issue, except my computer won't even get past the windows boot screen.
I shut it down normally yesterday, and when I went to boot it up this morning, it booted to the windows screen, then the screen went black, and then nothing, for about 20 minutes, so I did a hard boot, when it came back up it reccommended launching startup repair, so I did that, and it then said the issue was "Your computer was unable to start", and reccomended I try restoring it to an earlier point when it did start. So I did that, it restarted, and came back saying that the problem couldn't be fixed by the startup repair. So, what should I do now?