Local Users and Groups is the best option to accomplish this task. Local Users and Groups is a tool that allows managing the local user accounts and groups on a Windows workstation. The technician can use this tool to create a new user account with administrator privileges or add an existing user account to the Administrators group. This way, the technician can log in with the administrator account and make system changes without elevating permissions. Group Policy Editor, Device Manager, and System Configuration are not correct answers for this question. Group Policy Editor is a tool that allows configuring policies and settings for users and computers in a domain environment. Device Manager is a tool that allows managing the hardware devices and drivers on a Windows workstation. System Configuration is a tool that allows modifying the startup options and services on a Windows workstation. None of these tools can directly grant administrator access to a user account. References:
* Official CompTIA learning resources CompTIA A+ Core 1 and Core 2, page 13
* CompTIA A+ Complete Study Guide: Core 1 Exam 220-1101 and Core 2 Exam ..., page 103

Rebooting the computer into safe mode (Option B) limits the processes and services that run, which can help in isolating and removing persistent malware that might be hiding in normal mode. Safe mode provides a cleaner environment to troubleshoot and remove malware.
* Restoring from a backup (Option A) may work but should be considered after attempts to clean the infection.
* Purchasing a new endpoint protection tool (Option C) is unnecessary at this stage since existing tools can be run in safe mode.
* Using system recovery (Option D) could potentially remove the infection, but it's a more drastic step that may not be necessary yet.
CompTIA A+ Core 2 References:
* 3.3 - Best practices for malware removal, including booting into safe mode

Comprehensive and Detailed In-Depth Explanation:Checking the hash value (such as MD5, SHA-1, or SHA-256) is the best way to verify file integrity after downloading. A hash function generates a unique string for a file. If even a single bit in the file is changed, the hash value will be different. Many software vendors provide hash values (checksums) on their websites to help users confirm that the files were downloaded without corruption or tampering.
* A. Clear browsing data - Incorrect. Clearing browsing data does not affect downloaded files or their integrity.
* B. Install SSL certificates - Incorrect. SSL certificates encrypt data transmission but do not verify the integrity of downloaded files.
* D. Use trusted sources - While downloading files from trusted sources reduces the risk of corruption, it does not verify file integrity.
Reference:
CompTIA A+ 220-1102, Objective 2.5 - Basic Security Concepts
CompTIA A+ 220-1102, Objective 4.3 - Best Practices for Data Integrity

The correct answer is B. Put the phone on silent.
* IT professionals must maintain professionalism and minimize distractions while on the job.
* Putting the phone on silent ensures that the technician stays focused without causing disruptions to their work environment.
* If necessary, the technician can check and respond during an appropriate break.
Why Other Options Are Incorrect:
* A. Step aside and answer - This is unprofessional unless it is an emergency. Taking personal calls in front of a client can give a bad impression.
* C. Text a reply - While this may seem reasonable, texting in front of a client still creates an unprofessional image.
* D. Ignore the phone and continue working - While ignoring calls prevents distractions, a silent mode ensures that notifications do not cause disturbances (e.g., vibrations or sounds).
CompTIA A+ 220-1102 Exam Reference:
* Objective 5.1 - Given a scenario, use the best practice procedures for documentation, privacy, and professionalism.

Checking for application updates is the first troubleshooting step that the user should perform, because the application may not be compatible with the new OS version and may need an update to fix the issue. Deleting the application's cache, rolling back the OS update, or uninstalling and reinstalling the application are possible solutions, but they are more time-consuming and disruptive than checking for updates. References: :
https://www.comptia.org/training/resources/exam-objectives/comptia-a-core-2-exam-objectives : https://www.
lifewire.com/how-to-update-apps-on-android-4173855