The notion of Human-Computer Interactions (HCI) has benefited from advancements in computer technology since computer systems now have user-friendly interfaces that people can readily utilize. The mental models illustrate how various people see how computer systems act while addressing environmental issues. The effectiveness of human-computer interfaces for intellectual models and the advancement of computer systems have been studied by young, educated, and intelligent people. The human-computer interfaces are created in a manner that connects to the user's intellectual models, making it simpler for them to carry out their tasks. The paper also concentrated on fidelity prototyping, which involves taking into account users' emotional intelligence so they might become more likable as they interacted with the computer interface. The paper will also concentrate on the many techniques that may be used in a single human-computer interface design, the outcomes of mental models, and the newest HCI trends that seek to enhance human-computer interaction. The findings demonstrated that individual variances affect a person's capacity to run programs on computer interfaces. This was discovered to be the consequence of their mental models differing from those of the designers of the human-computer interfaces, making it more challenging for people to communicate with the computer systems.