What is the first step to performing hardware maintenance?

A) Turn off the computer and remove its power source.
B) Install anti-virus software.
C) Disconnect all the input and output devices.
D) Disconnect the UPS and surge suppressor.

Hardware Maintenance

The routine servicing and repairs of physical computer and electronic equipment to ensure their proper functioning.

Power Source

Refers to the origin of power that supplies energy for electrical devices, which can range from batteries to electrical outlets.