Utility program

File manager

Used to manage files on a disk such as delete, copy, move, rename and view files and performs tasks of formatting and copying disks, displaying a list of files on a storage medium, checking the amount of used or free space on a storage medium.

Diagnostic utility

Compiles technical information about a computer’s hardware and certain system software programs and then prepares a report outlining any identified problems.

Antivirus

Used to protect against viruses by deleting them.

Disk defragmenter

Stores data on a disk, it places the data in the first available sector on the disk.

Screen saver

Displays an animation or blank screen when you don't move the mouse or keyboard.