I see two things in your dxdiag, but not sure if they might be related:
First one is this one: "DxDiag Previously: Crashed in system information (stage 3). Re-running DxDiag with "dontskip" command line parameter or choosing not to bypass information gathering when prompted might result in DxDiag successfully obtaining this information"
Seems like some issue/error? Did you get any errors when running dxdiag?
Second one is this one: "Sound Tab 4: The file vbaudio_vmauxvaio64_win7.sys is not digitally signed, which means that it has not been tested by Microsoft's Windows Hardware Quality Labs (WHQL). You may be able to get a WHQL logo'd driver from the hardware manufacturer. Sound Tab 5: The file vbaudio_vmvaio64_win7.sys is not digitally signed, which means that it has not been tested by Microsoft's Windows Hardware Quality Labs (WHQL). You may be able to get a WHQL logo'd driver from the hardware manufacturer."
Maybe update/remove that driver (if possible) to see if it helps? Seems to be from some VBAudio driver?