If some people want or need such thorough cleaning that their settings
have to be sacrificed in the process, I'm glad CCleaner provides this
capability for them. But it isn't a behavior the user has any reason to
expect. There must be a mechanism to bring the behavior to the user's
attention before the effect is felt. One obvious way would be to turn
Office cleaning OFF by default and pop-up a warning when the user
checks Office. At this point, the CCleaner developer's irresponsible
marketing of the product has destroyed the confidence in a product I
need to allow it access to my registry, and I have deleted CCleaner.