I know there are similiar threads out there but when I installed my dvd writer I clicked on the "Add New Hardware" tab to remove my old cd-r writer directories and when I completed that and rebooted it reset alot of my settings and suffice to say my new dvd writer became drive D and my dvd-rom has been completely erased from my computer and it only recognises the new writer. I have downloaded the supposed drivers on the internet and I have done restores and went to Device Manager and everything and can't get anything to recognise my rom. It is a Samsung DVD Rom SD-608. If any of you know what to do please let me know. It has been quite frustrating.