The CPU is shutting down because it is overheating (ie thermal shutdown) and won't boot up again until it has cooled down. If this problem is not fixed, eventually the CPU will fail completely.
Check the CPU fan to see if it spins freely. Also check the power supply fan to see if it spins freely. If the CPU fan has failed, then replace the CPU fan. The CPU fan and heat-sink assembly may be clogged with dust, if so loosen the dust and vacuum to remove the dust.
SOURCE: cpu high temperature problem
Overheating problem
Remove case side and clean all fans
remove fan from heat sink usually 4 screws or little clips
Do NOT remove heatsink stuck on with heat paste
clean vanes in heat sink replace fan
use stiff brush and vacuum cleaner to clean outside of power supply
vacuum out case include all vent holes
reboot computer should work ok
replace case side
SOURCE: shut down automatically while playing
try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no?MOISTURE in the air line dust causes static to build up in a computer causing it to overheat any many other problems One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive Test all leads that attach to your hard drive including electrical extensions,IDE,SATA the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error if this fails to fix the shutting down
another possible reason could be a memory dump you might be running to many programs at the one time placing to much strain on the CPU also you might not have enough RAM random access memory to check what is running when your computer is running scroll to the bottom toolbar right click select task manager applications and processes if you see something you dont need running select end now to check how much ram you have click start right click on my computer select properties you will see all of your computers details another way to check how much RAM you have click start all programs accessories system tools system imformation all of your computers imformation will be there try uninstalling a few unnecessary programs then click start run type cmd then type chkdsk/r/f which will scan for and attempt to fix any bad sectors and automatically fix any corrupt files on your hard drive this will schedule on a restart don
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