Shut down, but not watching movies

Hi,

My computer, MacBook Pro 15" retina late 2013, freeze and

shutdown, some times just shut down.
When I first open it in the morning it will run for about an hour,

after that , when I restart it, only for short times. 1-2 minutes.

There are no problems watching movies in Youtube. It runs

for hours and hours. (The sound in Youtube comes and goes.)

I submitted it to the workshop. They didn't find anything wrong

but change the battery. I bought a new, original, charger. I have

had help from the Apple Senior Support, and there are no

software problems.

Any one who has any ideas?

The hard drives?

Thank you! // Marielle