Registry cleaner tools, registry repair software, registry scanners or registry cleaners are all the same type of software program. Their mission is to scan Windows operating system registries and find any registry corruption that may be present. 
If the registry cleaner finds any, it then repairs or fixes this corruption. This operation removes any impediments the operating system may have been dealing with. These impediments work against the operating system and cause the computer to run slowly, some times very much so.
With today’s ultra-complex registries, corruption is very much an issue as it causes slow running computer operations, errors and crashes.
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