for around a year now my PC has been randomy turning off anytime I play games. It happens during any games, it sometimes even happens in online flash games. It started a while ago when after coming back from holiday the wouldn't turn on properly. I turned it on, and all the lights came on inside tower, but the monitor got no connection, and it kept making a clicking noise. After a while it started coming on then going off again after a few minutes until it eventually it got back to semi normality (where it is now). This is a really annoying problem and I would appreciate any help.