I still get this message on both my computers and cannot load X4 successfully. Just to make sure I wasn't doing the process wrong I gave the chore over to my son who is in IT work. Same result.
There is a new computer arriving this week and my guess is that I still will not be able to load from the CD. I had to revert back to the e copy to get on with my work. Not that thrilled.
I am actually thinking that I have a faulty disk. Only time and patience will tell.
Rupert.