a few minutes of video playback.. WMPlaye, VLC, youtube. ect... it will happen locally and on my secondary display (32inLED samsung TV)

I've changed the settings to the same ones I had in windows 7 and it still times out.

win 8.1 64bit
stock hd intel video card and updated drivers

lost as all hell... I looked around in on the site and never really got a straight answer. please help