It may look like the computer has crashed and all your data is lost forever. But there are a host of problems that keep you from reaching your data or the network that can be fixed, sometimes in a matter of minutes.
If it’s your computer at the school, all the documents on the “H” drive (your “My Documents folder) are saved on the server and not on the individual computers in the classroom and labs so they’re most likely still there. Even if they’ve been saved on the “C” drive of your room computer, they may still be there waiting for you.
That's not to say catastrophic data loss doesn’t happen – it can, but not very often.
Here are some basic problems you might encounter: