Thanks Whisperer for your response.
The DVDs in question are a teaching series from a Christian ministry and they are not protected. In fact, they encourage redistribution.
I have XP SP2 w/ all the updates on both systems and though I have AnyDVD, I was not using it at this time.
The DVDs are in perfect condition.
To tell you the truth, I am not sure what brand the Compac drive is, but it more than likely is different from the ones in the desktop, as the desktop is a much newer machine.
Thanks for the link Coaster. I read it but I'm not sure it applies to this situation, but then I'm a novice here.
By the way, I do use AnyDVD and CloneDVD2 on the AMD desktop to make copies of commercial movies in my library and I have never had a problem with reading or burning except due to scratches/damage.
At the same time I have tried downloading movies from the www (uhoh), and I consistently had problems when I played the resultant DVDs. The burn went fine but when playing on a player in my entertainment system the movie would inevitably begin to drop frames and then lock up 70-90% through the flick. I even bought another player thinking I had an older unit that was missing something, but I still got the same thing.
This week I was researcing for a 4 port video capture card and software package to install in the desktop so I could run a home surveilance system. Interestingly, I discovered that almost every capture card I found specified that it would only work with a Intel (Pentium) chip set. When I called the tech staff of one of the vendors, he had me download and run a program that prints out a complete survey of my system. When he saw the video chip set was from VIA, he said none of the systems he was aware of would work. I don't know how that fits in here, but somehow I bet it does.