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:
In enterprise environments, network-based deployment solutions (such as Windows Deployment Services or SCCM) allow administrators to push images across the network to hundreds of devices efficiently. These tools support hardware-specific drivers (for different vendor classes) and can accommodate user-group configurations using task sequences or answer files.
A: and B (xcopy and robocopy) are file-level tools and not designed for full OS image deployment.
C: Using local tools per device is inefficient for large-scale rollouts (800 devices).
D: Network-based deployment is the industry standard for this scale.
Reference:
CompTIA A+ 220-1102 Objective 1.4: Given a scenario, use appropriate Microsoft operating system installation methods.
Study Guide Section: Deployment methods (including PXE boot, image deployment)

The correct answer is B. Task Manager, because Task Manager allows technicians to view, manage, and terminate running processes, including those that are frozen or unresponsive. If an application process is already running but not responding, launching it again will fail until the existing process is stopped.
According to the Quentin Docter - CompTIA A+ Complete Study Guide, Task Manager is the primary Windows tool for troubleshooting application hangs, excessive resource usage, and nonresponsive programs.
Technicians can end the task and relaunch the application cleanly.
The Travis Everett & Andrew Hutz - All-in-One Exam Guide explains that Resource Monitor provides detailed performance metrics but is not optimized for quickly terminating frozen applications. Event Viewer logs errors but does not resolve active process issues.
The Mike Meyers / Mark Soper Lab Manual reinforces that Registry Editor should never be used for live application troubleshooting due to the risk of system instability.
Because the issue involves an unresponsive background process, Task Manager is the fastest and safest tool to resolve the problem, making B the correct answer.

The correct answer is D. Connect a wrist strap to a metal frame, because this action directly prevents electrostatic discharge (ESD), which is one of the most common causes of accidental hardware damage during device disassembly. Even when a device is powered off, static electricity stored in the technician's body can discharge into sensitive components such as RAM, CPUs, and system boards.
According to the Quentin Docter - CompTIA A+ Complete Study Guide, the most effective way to prevent ESD is to equalize electrical potential between the technician and the device. An ESD wrist strap, when connected to a grounded metal surface such as a computer chassis, safely dissipates static electricity before it can damage components.
The Travis Everett & Andrew Hutz - All-in-One Exam Guide explains that while antistatic mats and bags are useful, they are secondary controls. The wrist strap provides continuous grounding throughout the repair process, whereas mats and bags only protect components when they are placed on or inside them.
The Mike Meyers / Mark Soper Lab Manual reinforces that working on plastic surfaces does not guarantee grounding, and placing components in antistatic bags is something done after removal, not immediately after powering down.
Therefore, once the device is turned off, the next and most important step is to connect a wrist strap to a metal frame, making D the correct answer.

Comprehensive and Detailed Explanation From Exact Extract:
A low-level format (also referred to as a zero-fill or full format) writes over every sector on a storage device, effectively destroying the existing data and making recovery nearly impossible. Unlike degaussing, which renders the drive unusable, a low-level format maintains the integrity of the device, allowing it to be repurposed or reused.
A: Deleting partitions does not fully erase data; it only removes references in the partition table.
B: EFS (Encrypting File System) encrypts files but does not securely wipe them.
D: Degaussing destroys the magnetic structure of a drive, making it inoperable and not reusable.
Reference:
CompTIA A+ 220-1102 Objective 4.3: Given a scenario, implement basic change management best practices.
Study Guide Section: Drive sanitation methods - low-level format vs. degaussing vs. deletion