My laptop freezes and the only way to do anything is by hitting the manual power button. Help!

My laptop did this twice to me today. It froze whilst I was going about my business, once watching a video and the other time reading a pdf article for my school assignment.

When it freezes, everything is unresponsive. I cannot move my cursor via mouse or trackpad, and keyboard shortcuts do not work (like to open task manager or simply ctrl+alt+delete). It also makes an ear-shattering buzzing sound as it freezes when on a video.

The only way I can do anything is hitting the power button. It then takes me to a blue Recovery screen, where nothing helps me. I restart my PC and it is significantly slower this way than when it normally starts up.

I have a Dell Inspiron 13-5368, and I've already checked to make sure Windows 10 is up to date. So I'm not sure why there should be such a problem. My antivirus has also not caught anything.

By the way the computer reacts, I'm not sure if there's maybe an issue with a random driver? Or something wrong with my hardware? 

Also, sorry if I'm posting in the wrong part of the forum!