Use of the best free registry cleanup software is the ultimate solution to such problems. If not it gets accumulated in the form of redundant and leftover registry entries that eat away gigabytes of your hard disk space making it slow and sluggish. Ideally whenever we uninstall a program its related registry entries should also be deleted. Whenever you launch any program or application it starts working with the help of the settings stored in the registry entries.
In other terms it is a warehouse of settings and information related to various hardware components, OS configurations and users preferences. Windows Registry is a database of multiple Microsoft Windows OS configuration settings. Frequently Asked Questions About Windows Registry Cleaners: What is the Purpose of Windows Registry?