My computer is nothing but WINGDINGS now! How do i switch back to normal fonts!?

It's like the Black Plague just came and swept over my laptop!! My daughter had been messing around with the keys and the next thing i know, everything is WingDing Fonts! You know, the words/letters that are shapes. Im not 100% sure its actually WingDing (if that even matters) but its something just like it. I cant read anything when i go into the control panel, i even called my service provider AND Microsoft, nobody can help me! Does anyone have a clue how to fix this??? it's mainly on my desktop and in my files. when i go online i can mostly read stufff from the site, like for example, i can read what im typing now and everything else on yahoo. If anyone knows how to fix this, I will be so much more than thankful!!! Oh and i have Windows Vista if it matters...any advice or sites that could lead me in the right direction?