Thanks for that.
There's a couple of "Stopped responding and was closed" events, but they were for "Mail" so not relevant I don't think?

I'll check the graphic card driver now.
Cheers

I have exactly the same problem.
I have done a fresh install of win 10 (after doing an upgrade that left my system very, very sluggish), but whenever I have gone to restart the computer (Acer...