Easy. Just restore them from your back-ups. What you say? No back-ups.

You just learned a valuable lesson, back-up, back-up, back-up, to another media...CD, DVD, external hard drive, a web-based on-line 'pay-for' service like Carbonite:
http://carbonite.com/

Seriously, did you really expect that a single machine could save all your important documents and other stuff...forever?
Computers break...software get corrupted...hard drives fail. Other people hold grudges and delete files.

Back-up! Back-up! Back-up!

Sorry for the "tough-love" dude.

Hope everything is recoverable!

Good luck.