Ok Lloyd
1) Try to get your IT friend to remove and reset the CD/DVD Drive as advised to you earlier by ddouglass sometimes a slight knock can loosen a pin connection to the drive.
2) If that don't work then maybe your driver files are damaged or corrupted.
3) Reinstall your CD/DVD drivers, that should do the job.
4) Please let me know if this works for you.
Good Luck Joe....
Ps the fix I gave you earlier would have worked if your Cd Icon was availible in your divice manager. (sorry) 