Antivirus or anti-virus software (often abbreviated as AV), sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software.
HARDWARE
Computer hardware is the collection of physical components that constitute a computer system. Computer hardware is the physical parts or components of a computer. By contrast, software is instructions that can be stored and run by hardware.
SOFTWARE
Computer software, or simply software, is that part of a computer system that consists of encoded information or computer instructions, in contrast to the physical hardware from which the system is built.