The dump points to dxgmms1.sys which is a Microsoft file, unlikely to be the actual cause. More likely it's your video driver. I see this in the dump:
The current date/time for that file is: Thu Aug 06 19:16:04 2015
ffffd001`fdb46308 fffff801`d516db0bUnable to load image \SystemRoot\system32\DRIVERS\nvlddmkm.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
I suggest uninstalling the current Nvidia driver using Display Driver Uninstaller then use Nvidia Geforce Experience to install the latest avaialble, see if that resolves the problem.