

The usefulness of cleaning the registry is highly overrated and can be dangerous.For example, removing malware related registry entries before the infection is properly identified can contribute to system instability and even make the malware undetectable to removal tools. Improperly removing registry entries can hamper malware disinfection and make the removal process more difficult if your computer becomes infected.

A backup of the registry is essential BEFORE making any changes to the registry. If the changes prevent the system from booting up, then there is no backup available to restore it in order to regain functionality.
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The registry is a crucial component because it is where Windows " remembers" all this information, how it works together, how Windows boots the system and what files it uses when it does. Whenever a user makes changes to settings, file associations, system policies, or installed software, the changes are reflected and stored in this repository. It contains information and settings for all hardware, software, users, and preferences. The Windows registry is a central repository (database) for storing configuration data, user settings and machine-dependent settings, and options for the operating system.

Registry cleaners are extremely powerful applications that can damage the registry by using aggressive cleaning routines and cause your computer to become unbootable.Bleeping Computer DOES NOT recommend the use of registry cleaners/optimizers for several reasons:
