In the context of computer systems, if a "fatal hardware error" has occurred and a record describing the condition is contained in the data section of this event, what is the most appropriate first step for diagnosing the issue?
A) Reinstall the operating system to ensure all system files are intact.
B) Review the event log to analyze the record for specific error codes or details.
C) Upgrade the computer’s RAM to improve overall system stability.
D) Perform a full virus scan to rule out potential malware infections.