Windows 7: my laptop turns off with out my permission

Hi
I have a probook4520 HP laptop
but it has a problem
when I use it for a long time or convert big files or do some graphical jobs it turns off with out my permission
what should I do
In Ubuntu OsS I have this problem too
please help me
thanks

Hi and welcome to the Forum.
Are you running on mains or battery?

main ofcourse

install a temp monitoring software like temp core and let us know what the temps are reading during idle and heavy load like that which is turning off your computer. This sounds like a possible overheating issue, when was the last time you cleaned the computer by using something like an air can to clean your fans and vents?

I was just about to suggest this and also ask where does the laptop sit when you are using it? Has it a clear space underneath and I would re iterate the need to "blow" the dust out frequently. IMHO it is overheating!

CoreTemp

Post a screenshot of the program's readings using:

Screenshots and Files - Upload and Post in Seven Forums

Speccy and CPUID HWMonitor are also good programs for monitoring your temperatures.

it's on my table
I am downloading and doing that job sorry please wait a little while

It is okay, we are patient, if you take your time, then we know you are hopefully following instructions, also some of us are bored at work while browsing the forums...

Don't let the boss see that else he/she will find you something nasty to do? Have the company toilets been cleaned this morning?

104 digrees
when it turned off automatically