Question Computer just goes off and restarts on its own

[diliptimblo]

While using a computer, it just goes off and restarts on its own This keeps happening time and again. Sometimes every half and hour. It becomes difficult to work on the computer. Can you tell us what could be the problem and how to rectify it.
Computer just goes off and restarts on its own

 

[DSzymborski]

Best place to start would be a full list of specs including exact PSU.