I forgot to mention something : when i play WOFF, and i want to open nVidia CP ( for example ) i press the Window key on my keyboard. OK, so far so good. I'm on the desktop and i do whatever ...
But when i return to WOFF, i receive this :
http://postimg.org/image/t375u7uf5/
But the game is running again when i press the game tab, in the taskbar.
I re-installed MSFT C++ , i updated Windows, i repaired NetFramework.....
Tomorrow i will try with another monitor, i have an BenQ BL3200 PT, arround ( 2560 x 1440 )
By the way, today i upgraded my TV 4K Samsung UE40JU6550 with 4K Samsung UE48JU6550, actually the same thing, only 8 inches bigger. It's GREAT to fly, my Lord...
With both, 40 and 48 inches, stutterings. I think it has nothing to do with the Samsung tv.
I tested today DCS World, BoS, BoM, RoF, Project Cars, CoD ( Cliffs of Dover is " famous " for issues with or without TF mod ) and didnt have any issue, except CoD, but thats an old story