My GL703GM Laptop keeps crashing!

Over a year ago I bought a brand new GL703GM Laptop, it has held up well but it constantly crashes when I leave it on overnight to download files. I don't understand why. I have the fans set to over-boost so it isn't a thermal issue. I can play high intensity games without throttling. However it will without fail crash every time I leave it on overnight. It's incredibly frustrating. Anyone have any idea how to fix this? Is it a firmware issue? Thank you for your help.