Hey fellas lately, once in a while when I listen to a music or playing, I hear my computer make a tick sound like it does when it shuts down. At the same time the music skips for a second. One time when this happened, my game just shut off and I was returned to desktop.
You may want to have your hard drive checked out. Sounds like it could be failing at times. If nothing else, and your BIOS supports it, enable S.M.A.R.T. monitoring on it, which will let you know if there's something going on. You can also use scandisk within Computer Management.