Neil wrote on 2/9/2015 9:07 PM:

Regedit is not a "registry cleaner" in the same sense as the programs
being discussed. Basically, it's a specialized "word processor"
dedicated to the registry. Still, there are risks when using regedit,
too. Delete or change the wrong things and the computer can be trashed.

Tell us what those are so we can be more aware of what to keep away from.