Putting another OS on it would be the easy part. It sounds like it might be overheating though. If you keep turning it on and it overheats over and over, you will damage internal components eventually.
Has the fan totally died? can you hear it whirring? Is it clogged? Can you blow a can of air in it or vacuum out stuff (better be off first)? I have had to do that myself when I noticed my fan wasn’t moving. I turned mine over and found the fan, I used a toothpick or something slim to move it around and make sure it could spin freely.
The fan runs. and I have a lot of ventilation.
Just so you know. I fired up the machine a few minutes ago and didn’t do anything.
Just sat here, and it just shut down completely, powered down for no reason.
I am going to double check my power settings, but I usually have them all turn off.