So I downloaded a program that cleans unused files and unneeded files. Apparently it erased some kind of startup files or something cause I shut the computer down one night and the next morning I went to turn it on and it just goes to the blue screen and the loading icon comes on for 5 minutes. It is a Macbook and after sitting there for 5 minutes it just shuts down and tries to start up again. I don't know what I have to do to restore it cause it removed my thingy called "Matt" which is I guess my hard drive name. I'm not every good with computers so I dont know all the names for things.