That is a memory access violation... That generally means a hardware problem if you are getting 0xc0000005 blue screens...
I would check CPU temps and video card temps
P.S Try to deactivate the automatic restart function of windows. You can do it under the Systemproperties (right click on "My Computer") > Advanced > Startup and Recovery Settings. Remove there the checkmark from "Automatically Restart" in the System Failure section.