But if I remember correctly, are not all bootable devices such as hard disks, cd-roms & dvd-roms set up by the bios when the computer boots?. I don't mean that's when drivers are installed, I mean is that not when they are set up & recognized? That's where I would start, re-boot the computer & see if your drive is recognized in BIOS. If not it may be set up wrong or not set to auto detect. As far as the standard Windows Explorer window opening, I believe that this is because the files on the dvd's are not associated with a program. When the Explorer window opens, right click a file & choose open with....... Power DVD XP. If that works OK, then do the same again & tick the always use this program box.