I'm experiencing the same issue on 10.0.10586.242 and 10.0.10586.318 on SAMSUNG ATIV S.
The issue is as follows:
- The phone restarts all of a sudden.
- It works for some time, then it restarts again, soon after it restarted itself.
- After this restart you see Windows logo quick and then you see only black screen.
It looks like there are issues with writing to the SD card. Seems to me that Windows restarts on errors writing to the SD card. Next time it fails to start due to errors on the SD card.
If you pull out SD card, the phone enters loop mode (it buzzes and Windows logo doesn't show off).
I've had this on 10.0.10586.242. Left the phone on the charge while I was sleeping but was happy to find the phone working in the morning.
Thought that was a single case. However today's morning the phone restarted again. Now that it 10.0.10586.318. It wasn't update issue, because the phone worked for more than 24 hrs after it updated to 10.0.10586.318.