I don't think that Build 10041 and my AMD gaphics driver are the best of friends.

I have a 2550*1440 Viewsonic screen attached to an HD 5670 graphics card using display port.

Quite often when I am using Thunderbird email the screen blinks a couple of times and about all I can then do is press the power button which does at least make my PC do an orderly shutdown.

I rolled back the graphics driver but that has not solved the problem. There is a newer beta version but I have not read anything to suggest that this would be better.

Is there anything else that I can try?