Sounds like either the disc Dell sent you is bad, or your DVD drive is starting to fail. Take the disc to another system, and run a verification program on it. That should tell you if it's the disc or the drive.
Hi. I recently used the Operating System disk for my Dell Dimension 4500s to reinstall Windows XP. When installing, I got a message that said that there were missing files. My only option was to skip the file and continue installing XP. I did this, and things appeared to be fine. I then tried to upgrade to Windows XP Service Pack 3, but the install was unsuccessful on multiple attempts, and my computer would get screwed up and I would have to reinstall XP all over again, again skipping the missing files. This is a major inconvenience to me, since I can?t download any software because almost all software needs XP Service Pack 2 or later or else it can?t be installed. What can I do to upgrade successfully to Service Pack 3? Thank you.