my computer will periodically shut down and reboot while I'm in the middle of doing something1 person needs an answerI do too

Although it is impossible to be sure since you provided so little information, this is probably caused by a hardware issue. The machine could be overheating, component(s) could be failing. You can troubleshoot it yourself or take the computer to a competent local tech. Don't use a BigComputerStore/GeekSquad type of place. http://www.elephantboycomputers.com/page2.html#Hardware_TshootMS-MVP - Elephant Boy Computers - Don't Panic!