PC turns off when playing games!

controll all fans. Maybe it is too hot.

Probably overheating, clean it up.

Overheating?

almost definatly overheating like the others said, open up the case and clean all the fans, if its just a standard heatsink that looks like a home floorboard radiator with "fins", use a brush or something to fully clean them out. if you can take the comp outside and get yourself some compressed air. will help big time!

It's most likely set to automatically shut down when reaches a certain temperature, a.k.a overheating, as everyone said.

My pc always kinda heated but now it turns off when playing new games..

I can agree with everyone above. It's most likely overheating. I had the same problem with my laptop and all I needed to do was put an external fan next to the exhaust port and it hasn't prematurely turned off since!

Download Speedfan and check the temperatures regularly while playing. Write them down and google the max temps of your components.

Now Steamgifts transformed in cnet.com....

For god's sake, buy a good cooler!

As others said, most likely a overheating problem, CPU most likely.

overheat or faulty psu

What blue thing did your father change in the processor (your words)? Perhaps your laptop is overclocked trough the common Intel utility that laptops are nowadays usually shipped with, witch originates the overheat others mentioned. Try to change that into it's default value prior to opening the laptop to cleanup or change thermal paste (witch will void your warranty btw).

BURRNINGGGGGGGGGGGGGGGGGGGGGG