Okay... I've gone through the list of Westwood suggestions, and here are the results, item by item. Trick One: I added the +W to the end of the 'Properties' target. Result: no change. Trick Two: 1. I deleted the contents of my Windows Temp file. Result: no change. 2. I copied the contents of the setup folder onto the appropriate location on my hard drive, and then tried doing a setup using these files. Result: no change. 3. As I cannot shange the IDE transfer protocol in my BIOS (American Megatrends v07.00T,) this does not apply. 4. I tried to adjust the DMA sttings on my CD-ROM drives, by going in thru the Device Manager, but I'm using two DVD-ROM/CD-ROMS - which do not have this choice in the 'settings' tab (indeed, there was no 'Settings' tab either?) 5. As there was no settings tab, I could not turn on Autodetect. I do currently have Creative Labs 'Disk Detector' running, though. 6. I have not checked with the DVD-ROM manufacturers for firmware code updates, but as these two drives are less than 3 months old, I doubt that this will help. I could be wrong? I did check the regedit settings as suggested, but that didn't help either. 7. I now that this disk is not faulty, as it worked fine on my Win98 machine. It's in 'As New' condition, totally without blemish. So... that's it, I guess? I'm stumped again. I did try these suggestions over a year ago, when I first tried to get Dune running again. I was hoping that something might have changed for the better in the meantime... Any more suggestion... anyone? The first person that comes up with an solution, I'll send a case of beer to! I really love this program! Thanks again to all! ;D