These vary with each laptop so check that manual or web site.
I have an ASUS X550CA I bought around may of 2014 and it worked great for a while but now it won't start up, it gets to the screen that says ASUS but never goes past that. I am not afraid of completely wiping everything, just need my laptop back in working order.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic