3 of your dump files have VIDEO_TDR_FAILURE (116) bugcheck code but it seems your nVdia driver
is up to date.
So the culprit could be another drivers
or the hardware itself.
For troubleshooting purpose, I suggest to do the following:
1. Uninstall Alcohol 120% and Daemon tools (remove the sptd driver)
For alternative CD/DVD virtual software, you can use MagicDisc.
2. Uninstall PC-Tools Spyware Doctor and replace it with MSE.
3. Update this driver:
4. See if the problem persist, then test your Video card: Video Card - Stress Test with Furmark