Kurt,

You cannot change the serial number, I am talking about the DVD's ID number, not a security feature. I am pretty sure that you have a record somewhere in the bowels of your machine that might be seeing it as unfinished business................hence my suggestions.

Otherwise if you have any of those system cleaning tools, they might help................I use "ilSystem Wiper", "MRU Blaster" and "Internet Sweeper", they will generally get rid of the "history records" and the corrupted one in the process

Please keep me informed as to how you get on.

I have had this problem with both CDs and floppy disks and there are a variety of possible causes, I guess that we just have to be systematic, and cross them off the list one at a time?