Final answer:
The technique that the technician is using is guided questioning.
Step-by-step explanation:
The technique that the technician is using to help the customer locate the issue on their computer is guided questioning. Guided questioning involves having the customer provide step-by-step information to help the technician understand and diagnose the problem. By asking specific questions and listening attentively to the customer's responses, the technician can narrow down the issue and offer a solution.