this is not my software- its not related to movies playback
its the graphics drivers not liking some combination of screen refresh rates/sizes -when you use both outputs - its not so nice and simple...
you say you are running a dvi monitor and a thtg - you might be running one output with dvi and the other with vga - sometimes it really doesnt like this either.
they have different refresh rates.
running different monitors with different screen sizes and refresh rates can cause the graphics drivers to lock out while they try to figure out which screen they should be updating next....
you need to double check your overall screen size and refresh rates.
for example thtg does not work at 75hz in some modes.
and conflicts with other screen at 75Hz.
you have to find a combination that DOES work - not one that DOESNT - it if doesnt work there isnt anything i can do about it- its not my software - its the OS.
In the stats HUD - you need to check the exact refresh rates.
Please post your HUD stats - showing what i show here-