What is the main duties and responsibilities of being computer desktop support or computer technician?

Following are the primary responsibilities of help-desk support tech:

• Provide technical assistance and support to approaching inquiries and issues related to computer systems, OS, and hardware.
• Keep up every day execution of computer systems.
• React to email messages to clients looking for help.
• Install, modify, and repair computer hardware and OS.
• Run diagnostic programs to resolve issues.
• Pick up input from clients about PC utilization.