MAJOR problems

My computer suddenly stopped responding when I was clicking on items, so I decided to restart it, and... it wouldn't boot up! I got my installation USB device I used to put Linux mint onto the computer, and run the boot repair, however it didn't work and the report from the boot repair mentioned 'bad superblocks'. So, I tried to reinstall, thinking it would just wipe everything and give us a clean slate again, and it kept getting stuck at the point where it asks you to connect to the internet to get the ...