When an application program is installed in the computer, a registry key is entered in the windows registry stating that the application program is installed in the system and is working fine. The windows XP registry contains all the information about each and every application program installed in the computer. It also manages all the properties of all the applications that have been installed in the system. But sometimes the windows XP registry does not function normally and hence causes the processor to become slow and decline its performance.
When an application program is uninstalled from the system, then all the registry entries from the windows registry have to be deleted from the system. Usually these registries get deleted from the computer automatically but sometimes it happens that the application programs is deleted from the hard disk of the computer but it does not get erased from the disk. This causes errors in the system, which causes the computer to become slow and decline its performance. Due to the presence of the registry of the deleted software, the operating system keeps sharing the memory with that application despite it is not present there.
As a result of this, rest of the applications does not get enough memory to complete their tasks and since they take more amount of time to complete their task due to lack of memory. A registry checker tool checks for all those broken registry entries which have not been erased from the registry even after the application program has been deleted from the hard disk of the computer. All those registries which are erroneous and unwanted in the system are reported to the user and then the user can take measures about those entries accordingly. It helps the system to get rid of unwanted registries and increase processor performance.