Thank you, Richard
No, I haven't downloaded that particular program but the Google search brought it up as one of the references. There didn't seem to be any other viable references from either Google or Dogpile and I can't connect any recent changes on the machine with this particular area - although the installation of the external usb CD writer was a bit 'iffy'.
.... and, yes, I do use the add/remove rather than delete - unless the program has its own uninstall routine.
Thanks again