Due to which there might be utilization of memory simply, this affects the performance of system. Suppose when you uninstall few application form your system when they are not in use anymore, application gets uninstalled but its associated files which are created during each run and registry files are used still remain in hard disk memory even though you uninstall applications. Hence, your system will not become complete without registry files. However, the kernel, services, SAM, drivers, user interfaces and third party applications can use the Windows registry.
Besides, it stores settings for application running on your system which has opted to use the registry and for low level Operating System components. Registry entries are hierarchical database that stores options and configuration settings on Windows Operating System.
Remove Registry Entries for Uninstall Programs
