BleepingComputer.com: System restarts while playing some games

My computer is aging, i admit, but it will shut down while playing some games it should be able to run.
There is an audible click, and it restarts.

This happens with games such as Guild Wars (which used to run perfectly), Fable, F.E.A.R., and WoW (it happens really badly with WoW)

Is it time for a replacement?

Is it an older system? If so, it's probably full of dust and gunk that needs to be cleaned out. Make sure to get around the heatsink/fan on the processor, and the graphics card fan.

Since your system is old now you should not play games on it but ya you can do other work like surfing,doing office work etc..To play games you must switch to a new PC..

I would check the dust thing first. If your computer used to run it, I bet it won't suddenly stop running the games. I bet its the dust and the computer over heating.