Well at my school we would go to start, then pick something like:

Control Panel/Printers

or something like that. It should be right in the start menue. Then use the 'Up' button, you know the one that looks like a folder with an arrow pointing up. And do that till your in Mycomputer, click C:/.

If this doesnt help tell me why you want to get in and I still might have a way.

In 8th grade i got into the C drive and deleted files from the typing program we used. lol