Thanks again, BOAC.
No, haven't set up a new user profile (not at all sure that I would know how

) - although I originally installed the machine, mate and offspring modified it afterwards (against my advice!!

). If that is a prerequisite, methinks mate is going to be an unhappy bunny!!
SD, also thanks - have tried two other 'pooters' - same result, CD seen but unreadable. Re. Roxio reinstall, the complete factory rehash included Roxio as the incorporated CD burner so I would have thought that it would have been able to talk to its own offspring but maybe not. Will be able to try it out again on the machine in question this afternoon so will see what the 'helpful' Windoze message was.