Laptop reboot - now doesnt work? please help!

Hi Everyone!

Ive just attempted to reboot my toshiba satelite laptop, so i put in the product recovery cd, followed the prompts, it restored everything, then asked to remove all disk drives, then click reboot. so i ejected the disk, and clicked reboot. but now the screen is all black with a flashing curser at the top. and i cant get anything to work. i tried turning it off and restarting it, but the same thing happens. if anyone knows how to fix this, or whats happening id love to hear from you! thanks