This factor focuses on the level of difficulty presented to the end-user in using the system with anti-virus tools installed. This is intended to gauge the difficulty for the system user to utilize and correctly interpret the feedback received from the tool. This also measures the increased difficulty (if any) in fulfilling the end-user's job requirements.
Ease of Use is the combination of utilization and interpretation of results. This is a function of tool design and quality of documentation. Some classes of tools are inherently more difficult to use. For example, installation of the hardware component of a tool requires greater knowledge of the current hardware configuration than a comparable software-only tool.