TheLocal Users and Groups Manager (lusrmgr.msc)is the utility for managing user accounts, including renaming the default Administrator.
FromQuentin Docter - Complete Study Guide:
"The lusrmgr.msc snap-in allows renaming and managing local user accounts, including the default administrator." .

Comprehensive and Detailed Explanation From Exact Extract:
To ensure the authenticity of a downloaded application, the most reliable method is to verify the file's hash (e.
g., SHA256, MD5) against the value provided by the legitimate vendor. If the hash values match, the file has not been altered or tampered with. This verification confirms the integrity and authenticity of the executable.
B: Process IDs are dynamic and not unique to specific software.
C: Running in safe mode doesn't validate legitimacy-it only runs the app in a minimal environment.
D: File names can be spoofed; matching the name does not prove authenticity.
Reference:
CompTIA A+ 220-1102 Objective 2.2: Compare and contrast authentication and software integrity verification methods.
Study Guide Section: Hash verification for software authenticity and digital integrity

Comprehensive and Detailed Explanation From Exact Extract:
Event Viewer is the best tool to analyze the root cause of service failures in Windows. It provides detailed logs from system processes, including errors, warnings, and crash reports related to services and applications.
When a service starts and stops unexpectedly, Event Viewer will often record the cause, such as dependency failures or access violations.
B: Task Manager shows active processes but doesn't retain logs or causes of failure.
C: Internet Options is used for configuring browser settings, not troubleshooting services.
D: Process Explorer is powerful but more suited for live monitoring and detailed process trees, not post- failure log analysis.
Reference:
CompTIA A+ 220-1102 Objective 3.1: Given a scenario, troubleshoot common Windows OS problems.
Study Guide Section: Log file analysis using Event Viewer

Comprehensive and Detailed Explanation From Exact Extract:
Whalingis a form of phishing that targets high-profile individuals or involves pretending to be them (e.g., CEOs) to trick lower-level employees into transferring funds or sensitive data.
FromQuentin Docter - CompTIA A+ Study Guide:
"Whaling is a phishing tactic targeting executives or masquerading as one. The attacker crafts emails that exploit authority and urgency to manipulate recipients."

Comprehensive and Detailed Explanation From Exact Extract:
User offboarding involves disabling the departing user's access to company systems and facilities. Two key tasks typically include:
Deactivating physical access credentials (e.g., key fobs or badges) to prevent unauthorized entry (B).
Suspending or disabling the user's email account to prevent future use and to retain business communications (D).
A). Quarantining a hard drive is not standard unless malware or legal issues are involved.
C). Purging PII must follow legal retention policies; it's not typically an immediate offboarding task.
E). Disabling network ports may be relevant in some cases but is not a standard offboarding step.
F). Blocking MAC addresses is not typical unless the device is considered a security threat.
Reference:
CompTIA A+ 220-1102 Objective 4.1: Given a scenario, implement proper documentation and offboarding procedures.
Study Guide Section: User lifecycle management - onboarding and offboarding tasks