Final answer:
Utility software
Step-by-step explanation:
The program that performs a specialized task, such as a virus scanner, a file compression or a data backup program, is called utility software.
Utility software helps to optimize and improve the performance of a computer system by providing specific functions that are not offered by the operating system or other software applications.
Examples of utility software include antivirus programs, disk defragmentation tools, and backup and recovery software.