When I open "my computer," it will show my dvd drive icon with the word "dvd-rom," underneath the dvd player icon which is set to drive (E:). My Nec 3520a is unable to read any disc with the word dvd-rom. However it will read discs with the word "DVD" under the dvd drive icon. I am using Ridata 16x or Ritek 04 Media. The same dvd's are able to playback perfectly on my friends set top philips dvd player. The thing is my new nec drive won't play them at all. I have wasted so many dvd's trying to figure out how to burn my backups successfully. Any help on this problem would greatly be appreciated. I just want to be able to play my backups on my computer since I don't have a set top dvd player.