The registry of a computer is a system of hidden files which is the backbone of all information. It records every action, process and program used on a computer. Unfortunately, it becomes cluttered and disorganized, over time, because the registry does not delete expired data. This means that even though a program as been uninstalled, the registry entries that are no longer relevant may remain. Registry cleaners are programs that seek out this misfit information and eliminate them from your system. They can improve the performance and speed of a computer system. Cleaners are more effective than manual entry deletion.

On the Other: Safer Registry Cleaner Usage

The largest risk in using a registry cleaner is user error. The best way to ensure information is protected is to run a backup of the registry before starting a registry cleaner. Also, users must pay attention to the program instructions. Once the registry cleaner identifies the files that need to be removed from a system, users have to review the list and make sure that there is nothing important to their current software. Next, each registry cleaner offers an option to backup the files before they are deleted. Choosing this option prevents a fatal result from an accidental deletion. A registry cleaner needs to be run by itself. Running other programs while cleaning the registry can cause serious software damage.

Bottom Line

In order to keep a computer's registry clean, a user may choose to use multiple registry cleaners. This is not a problem as long as they are not run simultaneously. Registry cleaners are available free to download or for purchase. Both are safe and effective if used correctly when implementing a monthly registry cleaning regimen.

Source:

PC World: How to Clean Your Windows Registry and Speed Up Your PC