I have had several programs that, for some reason would not install from various CDROM drives over the years, but they work fine in another drive. Today, I try to install a new program from my Samsung CDROM drive. If that does not work, it goes into the TEAC CDRW. I am sure others have had similar experiences. Until you have two different drives, you might blame the CD in error. I do not experience this as much as I did in the past. No matter what drive reads the CD, once it is installed, the program is installed. I used to take CSR calls for a vendor and heard customers telling me the cd we shipped was bad. No, they couldn't be bothered to try it in a different drive. I am sure now that more and more people have multiple CDROM capable drives in their systems, once one drive has issues with a disk, the user immediately tries it in the other drive. The source of the files does not matter for most programs. That is why the network administrator can wake up your computer with a ping and commence with updates while you sleep.