As for me, there are the ones that I have no idea about and trust Windows, but with most of them I can highlight the registry information and verify it is the software key name I want to delete.
The times I've tried Revo, there was the one main registry entry with a cascading window of other keys underneath it to delete. Can you hover your mouse cursor over those to confirm them, or is it a check the first box to enable them all to be checked and deleted, cross your fingers and hope for the best

having of course backed up the registry first.