MFA (Multi-Factor Authentication) is a security measure that often uses an SMS or third-party application as a secondary method to access a system. MFA requires the user to provide two or more pieces of evidence to prove their identity, such as something they know (e.g., password), something they have (e.g., phone), or something they are (e.g., fingerprint)2. WPA2 (Wi-Fi Protected Access 2) is a security protocol for wireless networks that does not use SMS or third-party applications. AES (Advanced Encryption Standard) is a symmetric encryption algorithm that does not use SMS or third-party applications. RADIUS (Remote Authentication Dial-In User Service) is a network protocol that provides centralized authentication and authorization for remote access clients, but does not use SMS or third-party applications.

Linux is the most commonly used operating system in embedded systems because it is open source, free, customizable, and supports a wide range of architectures and devices. Linux also offers many advantages for embedded development, such as real-time capabilities, modularity, security, scalability, and reliability. Linux can run on embedded systems with limited resources, such as memory, storage, or power, and can be tailored to the specific needs of the application. Linux also has a large and active community of developers and users who contribute to its improvement and innovation. Some examples of embedded systems that use Linux are smart TVs, routers, drones, robots, smart watches, and IoT devices

When dealing with sensitive information, it's crucial to adhere to company policies and procedures. These policies will outline the proper protocols for handling and transporting devices containing sensitive data.
Here's why the other options might not be the best course of action:
* A. Remove the HDD and then send the computer for repair: While this might seem like a good way to protect the data, it might not be compliant with company policy. Some policies might require the entire device to be sent for security reasons or to ensure proper diagnosis and repair.
* C. Delete the sensitive information before the computer leaves the building: Deleting the data might not be sufficient, as it could potentially be recovered. Also, it might violate data retention policies or hinder the repair process.
* D. Get authorization from the manager: While getting manager approval is important, it's essential to first consult the company policies to understand the required procedures.
Recommended Steps:
* Check corporate policies: Review the company's policies on data security, device handling, and off- site repairs.
* Consult with IT security or management: If the policies are unclear or if you have any questions, seek guidance from the appropriate personnel.
* Follow the prescribed procedures: This might involve data encryption, secure data wiping, obtaining necessary approvals, and using approved vendors for off-site repairs.

This is because a PIN is a fast and secure method of logging in to laptops, and it is more secure than a password because it is not susceptible to keyloggers.

The msconfig.exe tool, also known as the System Configuration utility, is a tool that allows users to modify various system settings, such as startup options, services, boot options, and more. One of the features of msconfig.exe is the ability to disable or enable device drivers that are loaded during the system startup. By using msconfig.exe, a technician can prevent a driver from being loaded and used by the system, which will allow them to uninstall it without any errors. To use msconfig.exe to disable a driver, the technician can follow these steps:
* Open the Run dialog box by pressing the Windows key + R.
* Type msconfig.exe and press Enter.
* Click on the Boot tab and then click on Advanced options.
* Check the box next to No GUI boot and click OK. This will prevent the graphical user interface from loading during the boot process, which will also prevent some drivers from loading.
* Click on the Services tab and check the box next to Hide all Microsoft services. This will show only the third-party services and drivers that are running on the system.
* Find the service or driver that corresponds to the device that the technician wants to uninstall and uncheck the box next to it. This will disable the service or driver from starting during the system startup.
* Click Apply and OK and then restart the computer.
* After the computer restarts, the technician can use the Device Manager or the Control Panel to uninstall the driver that was previously in use.
References:
* How to Completely Remove/Uninstall a Driver in Windows, section 31
* The Official CompTIA A+ Core 2 Study Guide (220-1102), page 2212