I tried that, what I did was before each program run, for cccleaner and before running perfectdisk8 I made restore points. In the case of perfectdisk I switched off restore as this was causing multiple attempts to correct metadata file fragments. I do not know after which of the 2 programs caused me to loose the drives but I suspect perfectdisk not cccleaner.
With regard to backups, I did the create restore points I also did a full registry export to external hard drive. When I tried to import it it failed, so when everyone says create a backup, what am I supposed to do that does work?
regards
krishan
PS. I am going on loaded my programs again and this time I will only load either reg mechnic or cccleaner no perfectdisk and see if my cdrom's don't disappear. The first hint of trouble is they stop autoloading, so I change the value in registry key to enable autoload.