i have a Toshiba laptop with windows 7. i really need to restore the computer, but i threw out the cd it came with when i moved. i know that i can do it without the cd because i have accidentally before, but i cant remember how. i tried pressing f10 and f11 when i restart it, but nothing happens. i have also tried to do the restore back to a certain date but it doesnt go back as far as i need it. what am i doing wrong and how can i get this done?