I 'fixed' my problem that was not being able to open the Microsoft Windows 7 DVD (still on Vista). I primed the CD/DVD drive with a CD. The CD opened fine. Then I was able to replace the CD with the Microsoft WIndows 7 DVD and install the program. It's up and running and the CD/DVD seems to be running fine. Have no explanation for the 'cure' but it worked. It was interesting to me that the only program I had to delete before the upgrade was iTunes. That struck me a pretty funny considering all the nasty commercials the Apple guys have been running about Windows 7.