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Fig 1: a screenshot from a software application. Utility software is software such as anti-virus software, firewalls, disk defragmenters and so on which helps to maintain and protect the computer system but does not directly interface with the hardware.
Computer software or simply software is any set of machine-readable instructions that directs a computer 's processor to perform specific operations. Computer software is non-tangible, contrasted with computer hardware, which is the physical component of computers.