The .bat file type would be used in the Windows Startup folder to automate copying a personal storage table (.pst) file to a network drive at log-in. A .bat file is a batch file that contains a series of commands that can be executed by the command interpreter. A .bat file can be used to perform various tasks, such as copying, moving, deleting, or renaming files or directories. A .bat file can be placed in the Windows Startup folder to run automatically when a user logs in to the system. A .bat file can use the copy command to copy a .pst file from a local drive to a network drive. A .pst file is a personal storage table file that contains email messages, contacts, calendars, and other data from Microsoft Outlook. A .pst file can be backed up to a network drive for security or recovery purposes. The .dll, .ps1, and .txt file types are not used in the Windows Startup folder to automate copying a .pst file to a network drive at log-in. A .dll file is a dynamic link library file that contains code or data that can be shared by multiple programs. A .dll file cannot be executed directly by the user or the system. A .ps1 file is a PowerShell script file that contains commands or expressions that can be executed by the PowerShell interpreter. A .ps1 file can also perform various tasks, such as copying files or directories, but it requires PowerShell to be installed and configured on the system. A .txt file is a plain text file that contains unformatted text that can be read by any text editor or word processor. A .txt file cannot contain commands or expressions that can be executed by the system. Reference:
Official CompTIA learning resources CompTIA A+ Core 1 and Core 2, page 18 CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Cert Guide, page 459

The user is experiencing a vishing attack. Vishing stands for voice phishing and is a type of social-engineering attack that uses phone calls or voice messages to trick users into revealing personal or financial information. Vishing attackers often pretend to be from legitimate organizations, such as banks, government agencies or service providers, and use various tactics, such as urgency, fear or reward, to persuade users to comply with their requests. Phishing is a type of social-engineering attack that uses fraudulent emails or websites to trick users into revealing personal or financial information. Phishing does not involve phone calls or voice messages. Smishing is a type of social-engineering attack that uses text messages or SMS to trick users into revealing personal or financial information. Smishing does not involve phone calls or voice messages. Whaling is a type of social-engineering attack that targets high-profile individuals, such as executives, celebrities or politicians, to trick them into revealing personal or financial information. Whaling does not necessarily involve phone calls or voice messages. Reference: CompTIA A+ Core 2 (220-1002) Certification Exam Objectives Version 4.0, Domain 3.1

MSRA stands for Microsoft Remote Assistance, and it is a feature that allows a technician to remotely view and control another user's Windows PC with their permission. MSRA is built-in to Windows and does not require any additional software installation. To use MSRA, the technician and the user need to follow these steps:
On the user's PC, type msra in the search box on the taskbar and select Invite someone to connect to your PC and help you, or offer to help someone else.
Select Save this invitation as a file and choose a location to save the file. This file contains a password that the technician will need to connect to the user's PC.
Send the file and the password to the technician via email or another secure method.
On the technician's PC, type msra in the search box on the taskbar and select Help someone who has invited you.
Select Use an invitation file and browse to the location where the file from the user is saved. Enter the password when prompted.
The user will see a message asking if they want to allow the technician to connect to their PC. The user should select Yes.
The technician will see the user's desktop and can request control of their PC by clicking Request control on the top bar. The user should allow this request by clicking Yes.
The technician can now view and control the user's PC and assist them with installing software.

The Windows 10 desktop has Windows 10 Home installed, which does not support RDP (Remote Desktop Protocol) as a host. Only Windows 10 Pro, Enterprise, and Education editions can act as RDP hosts and allow remote access to their desktops1. The Windows 10 desktop does not have DHCP configured, is connected via Wi-Fi, or is hibernating are not likely to prevent the RDP connection if the technician is able to ping the computer successfully.