Is a registry cleaner necessary to improve my system’s performance?

No, registry cleaners are not necessary to improve your general system performance. The Windows Registry is a database that stores information related to the Windows operating system, such as program settings and user preferences. While the registry can become cluttered and fragmented over time, you can often improve your system’s performance by uninstalling unnecessary programs, deleting temporary files, and running a disk defragmenter or cleanup tool instead.