I have 3 DVD-R disks with content (documents, graphics files, etc. – NO VIDEO files) that was backed up from a previous computer. I cannot read (or even see) any of the content from these DVDs. I have an identical (type) DVD-R with video content, and it opens and runs just fine. I have a Toshiba Qosmio and its DVD drive reads: DVD multi-recorder; DVD rewritable; CD rewritable. When I insert any of these 3 data DVDs, the DVD drive (F on my machine) that usually says “DVD-RAM” next to the icon (in Explorer) now says “CD drive” (although the icon itself says “DVD-ROM” at the bottom of the icon). If I click on the F: drive icon, or attempt to “open” files from the F drive, I get an error message that says “F: not accessible. Incorrect function.” If I right click on the drive and go to properties, it shows that all the disk space is used (which should be correct – each of the 3 DVDs should essentially be full of content), but I cannot see any of the folders or files on this drive, even when I click “mixed media” as the file type to open (rather than video files). Again, inserting the exact same type DVD-R disk with video content into this drive works just fine. I have attempted the same procedure on my Dell Latitude D600 (DVD drive reads: DVD-ROM; CD rewritable). The DVD drive in this computer shows up in Explorer as “DVD/CD-RW drive.” When I insert one of these data disks into this machine and double click on the CDC drive icon, nothing shows up (but I get no error message). If I right click on the drive icon, under “properties,” then “settings,” the device shows up as “CD-RW drive” and under “media type” it says “device not ready.” Again, the identical type DVD-R disk with video content into this drive works just fine. Please help!