My Samsung Galaxy keeps shutting down!

Just update the laptop to solve this problem :)
It worked for me, my laptop is now functioning normally

To update your laptop, use Samsung Kies:
https://www.samsung.com/fr/support/kies/

Enjoy

Hello everyone
Just a heads up. I'm the owner of a Galaxy S4, it was shutting down often for the past 2 or 3 days, every time I took a photo or went to the gallery>. I tried copying my SD card to my PC and two photos refused to be copied. I deleted them from the card, put the card back (I had removed it from the phone for testing) and there it was, my phone is working perfectly again.
Hoping to have helped someone
See you soon

Hello everyone, well I've got the same symptoms as you: the screen turns off but the phone seems to be working, my phone would randomly shut down or turn off with minor shocks, I also experienced little colored dots all over the screen like snow,
to restart it, you had to remove the battery...
The problem is not software but hardware, it's just the connector of the LCD screen that goes to the motherboard that has come unclicked, you need to click it back in, to do this follow this tutorial: https://www.youtube.com/watch?v=gawHvFpeaKo

the connector is the one visible at 2:40
there you go