Apologies if this rant needs moving to another bit of the forum, but: It's 2013 and people are STILL posting: "I've deleted all my files and I don't have a backup!". Apple introduced Time Machine in 2007. There are any number of alternative software products to control backing up. External storage is cheap and easy to connect. There's also the whole Cloud thing. If you lose your data and you have no backup, then I'm finding it increasingly difficult to muster any kind of sympathy. My next reply to such a post is likely to be "Yep, that is to be expected." FILES WITH NO BACKUP ARE WAITING TO BE LOST. Get a backup. Get it now. NOW!!!