What is the purpose of the Disk Cleanup tool in Windows?

The Disk Cleanup tool in Windows serves the primary function of removing unnecessary files from the system, including temporary files, system files, and other types of files that are no longer needed. By clearing out these files, Disk Cleanup helps to free up disk space, which can enhance system performance and contribute to the overall efficiency of the computer. Temporary files can accumulate over time from web browsing, software installations, and system operations, taking up valuable space on the hard drive.

Utilizing Disk Cleanup regularly can help maintain optimal performance by ensuring that the system does not become bogged down with excessive data. This plays a significant role in managing system resources effectively and can improve backup and restore operations as well since there's more space available for essential files.

The other options are not associated with the Disk Cleanup tool's main function. Defragmenting hard drives is handled by the Disk Defragmenter tool, backing up system data typically involves backup utilities or software, and managing application settings is usually conducted within the respective application or through system settings rather than through Disk Cleanup.