Why does my computer keep shutting itself down?

Yesterday I put a dvd of the Nightmare Before Christmas. The language menu at the start popped up, but there was no cursor so I umed it froze and I shut the computer off. When I restarted it I clicked the option "start Windows normally". I thought maybe the digital copy would work, so I put that in and started clicking on any of the files on the disc that I could find because I didn't know how to start it. My computer froze again, so I shut it off and when I turned it back on clicked "start Windows normally" again. This time, I put in a different dvd. It played for not even ten seconds when the picture and sound froze. I moved the mouse but again saw no cursor, so I turned it off and left it off for a few hours. When I turned it back on I put in one of my videogames. Soon after it started a blue screen popped up saying "windows has detected a problem and needs to shut down" and it shut down. When I turned it back on again I entered safe mode and did a system restore. I put my videogame back in and it was okay for a while but then it went back to the blue screen and shut off again. I did the system restore to a "point" from last month, way before yesterday, and I'm still having problems with it.