Laptop won't shut down and restart properly

My laptop is Vostro 5470, works with Windows 8.1.

The laptop won't shut down, the screen goes black, but the lights are on, so basically it keeps working. Pressing any buttons won't help, so I have to keep pressing power button for like several minutes until it completely shuts down.

Restart won't work as well. Insted of it laptop just shuts down with a terrible beep sound. It causes a lot of troubles, I can't even download and install new drivers cause it requires a restart, and well... that doesn't work. 

Is there anything I can do about it? It's been a month or more since the whole thing started.