A technician receives a PC that frequently shuts down and has extremely loud fans.

Step by Step Detailed Comprehensive Explanation with All CompTIA References:

Analysis of the Problem:

Loud fans and immediate shutdown under stress are indicators of overheating.

Option Evaluation:

A. Install a liquid cooling unit: Premature without diagnosing the issue. Incorrect.

B. Monitor the core CPU and system temperatures: Confirms overheating and pinpoints thermal issues. Correct.

C. Reapply thermal paste to the processor heat sink: This may help but needs confirmation of the issue first. Incorrect.

D. Clean and test all fans: Ensures airflow but does not isolate the root cause immediately. Incorrect.