Issue my girlfriend is having with freezing

So I'm coming here to try and figure out an issue my girlfriend is having. It's becoming more of an issue lately, but sometimes when we are video calling on Discord, her video will freeze and that's where the issue gets worse. If she stops the video, the whole CPU crashes. She has tried shutting down and restarting the computer before it crashes, and sometimes that will fix it but sometimes it will freeze at the shutdown/restart and require a hard shut down. I'm just worried if she has to hard shutdown enough it will cause bigger issues. Any ideas?