Utility software helps maintain, manage, and protect computer resources. It includes programs like disk utilities, backup utilities, security software, and cleanup utilities. Disk utilities maintain files on disks, backup utilities safeguard files through backups, security software removes viruses and malware, and cleanup utilities delete unwanted programs. Other utility software includes file management, CD/DVD burning, file transfers, searches, synchronization, and desktop customization tools. These utilities work together to keep computers running smoothly and protect them from potential threats.