Registry Repair Doctor seeks out and deletes redundant entries in the Windows registry. This can speed up your system by reducing the size of the registry, which reduces the processing overhead required every time the registry is accessed. It can also find and delete registry entries that can compromise your privacy and security. You can adjust the options by selecting the Entries button and checking the entries that you want to search for, and select the Drives button and select all the drives you want to include in your scans.