Registry cleaners are absolutely a theatrical sham. The worst part is they are more likely to do harm than any positive effects simply by the nature of "regist

Registry cleaners are absolutely a theatrical sham. The worst part is they are more likely to do harm than any positive effects simply by the nature of "registry cleaning". The registry is an extremely MRU (Most Recently Used) optimized database. At best "regular cleaning" just trashes MRU statistics deoptimizing exactly what the OS tries to optimize in the first place. The registry is also heavily optimized to be read heavy rather than write heavy. At worst that MRU churn from "regular cleaning" directly becomes a cause for database corruption simply by the volume of writes it forces and the likelihood that a power loss or similar occurs during those writes. The number of times I've seen friends/family regularly using CCleaner and then complaining about corrupt registry hives and needing to drastically recover Windows is far too many.