ASUS laptop crashes every time I try to use it unplugged

I bought an Asus laptop a few months ago and I am now getting a blue screen of death when I try to use it unplugged. It doesn't crash immediately, but maybe 10 minutes later. One time, when it came back up, it no longer recognized it's own speakers as an output device.

Does anyone have any ideas on how to fix this? I am not very good at computers, so some of the guides online were hard for me to follow.