You can usually give the installer the serial number for PM, or load the installer disk for it, and it will continue.
If after doing that, you still can’t get it installed, contact Adobe. They should still be helping with installation issues such as this.
If not, get a case number and let us know.
Thank you for trying to help. I had already contacted Adobe and they recommended the forum. I had already tried the suggestions from the forum and nothing worked. However, after many hours of fussing between the copy on my old hard drive and the new installation, I got it to work.
Now, here's my gripe. I understand making it difficult for people to copy software, but it seems so counterproductive! That keeps honest people from copying it. Dishonest folks copy it anyway. I could easily have obtained an illegal copy. I wouldn't do that, but I was tempted! I had a legal copy that I couldn't use. How frustrating!
Thanks for listening to my gripe. And, cheers; my legal copy is working again. (Only because I've been involved with computers since "Altair" days." Remember them?")