I wonder if anyone has encountered this, system was originally 8.1 (still is recently) I upgraded this to 10 no real issues so downgraded it, I had a couple updates recently and to me it seemed to have switched itself off or went to sleep without plug, have had to put plug in to use it, so today I thought to do a restore, all goes well, the next minute I find out I am looking at a black screen - no login screen but the wifi is flashing, in the end and lucky having google/smartphone I had to do a system refresh (power button + volume down), anyone encountered this or am I the first? (good news is win 8.1 tablet is working)