Well, some strange things always happend whit this computer...now this thing start to auto-Shut Down after doing certain thing, like:

(Beleave me, that happend) Using the C-4 eletric Cannon (an old CC mod)
(Sometimes, after doing some movement or what) Playing Plataform Kick on multiplayer on Toribash

Any idea?The problem is that is starting to transfrom into a big-ass annoying.
If anyone can help me, I will be thankful

PS:And beleive me, those type of things happend, I'm not the type of guy that make useless topic for spamming

so all that really happened.

terrifying.

I'd guess that either your computer is overheating (could be dust buildup), or you're running into power supply issues. But it could be anything.

Hmm... but I had the overheat problem and that turn the computer off, the strange fact is that the computer behave like I selected the "Shut Down" option, you know? Like the actions causing an internal command that set the computer to shut down...a virus maybe?

An overheat would probably force your OS to run the shutdown command. Power supply would make it do a hard shutdown, just abruptly fail.

Maybe... I've seen an overheat error before, and it just dumped me to a screen generated by the BIOS.

Ding ding ding. Overheat response shuts your PC down abruptly. Air dust that nasty case, clean out your vent exhausts, and try again.

If issue continues, you may need to apply more thermal paste to your processor, or invest in more fans.

Clean out dust, check for faulty fans (like on graphics cards), disk check, virus scan, conflicting programs (did you install anything recently? Ive had some weird problems with 2 random apps causing seemingly unrelated problems), check for power problems.

If its going through the windows shutdown it doesn't seem likely that hardware is overheating (in my experience when something overheats it either shuts off, or preforms really strangely. And you don't seem to have those symptoms), so it sounds more software related.

What temp is your computer running at? CPU, GPU, ect. Are your drivers updated? (corrupted drivers?) Whats your computers specs? How long have the shutdowns been occurring? What OS are you running? Does it only occur when running games? (you could test by running a graphics demo and trying to see if it shuts down)

Thanks everybody for the tips. I'll try to test those thing.