Write short notes on the following: Registry Cleaner Software

Registry Cleaner Software Registry cleaners are programs that allow scanning the computer for any errors in the registry, which is a collection of the core computer files that are essential to performance and functionality, and repairs them if needed. A registry cleaner is a third-party OS utility which keeps the system error free by deleting redundant items like e-registry files of already uninstalled software or shortcuts that have since been moved. Registry cleaners are widely available on the Internet and give a significant upper hand when cleaning up the mess that a virus or other malware has left on the computer. Likewise, some otherwise safe programs can cause errors in the registry without intending to. Registry files can also be corrupted if the user unknowingly deletes or modifies a file in the registry. This usually occurs when an inexperienced user tries to fix their computer and inevitably causes more damage than before. Registry cleaners are required because the older versions of common OS like Windows tend to slow down with time due to size of unwanted registry database after a while of use. Manual cleanup of invalid entries, missing references or broken and invalid link registry entries becomes impractical because of the sheer number of entries, so finding the entry in question would be tedious; therefore the need for automation becomes apparent.