I got a kernel panic.
When I restart the laptop the system gets stuck in the loading screen (Apple logo and loading gif) with the fans spinning as if there was no tomorrow.
I tried booting in safe mode (power the computer holding shift) but no changes.
I've been waiting for 1 hour in the loading window already—this is not normal.
Best Answer
I tried almost everthing but nothing helped until I unplugged all the peripherals. It booted again with no problem, then I started to plug in one by one, in the end the mouse (not apple one) was the one bringing out the hardware conflict. I just replaced it and now everything is working smoothly.
Cheers