Thanks GG may well give that a whirl.
This is being sent on the machine in question - CD inserted and it doesn't repeat the error message, just shows the drive but no file details. I have just found my scribbles from when it first occurred and the message related to Data Execution Prevention. The 'help' bubble which accompanied it took me to Ctl Panel - System - Advanced - Performance - Settings - Data Execution Prevention. I tried selecting DEP 'OFF' for Windows Explorer (the only one on offer) and that had no effect. I've come across this particular nonsense before but can't remember how or, indeed, if, I resolved it
Will see what Roxio can offer.