I have this "HP-Pavilion dv5000" laptop, suddenly my dvd-rom wont work, no autorun, nothing..

Just " E:\ application not found". In properties it said that my device work properly, when i press eject, it eject, and DVD spin inside.. I want to format my laptop, and install new windows. But on restart, there isn't a boot, but it takes a lot of time... How to remove my DVD ROM? so i can buy a new one?