All of my files on my computer are gone, how do I get them back?

Alright, I went on some websites and alot of ads were coming up, then I got some crap downloaded on my computer. Like antivirus bogus bullcrap or something, y'know scareware. So I downloaded "super antispyware", because it was recommended on alot of guides. Oh and it worked. Maybe a little too good. It literally deleted EVERYTHING on my computer, all programs, drivers, you name it. I tried to system restore but that's gone too LOL! So what now?