Explanation: BitLocker is a Windows security feature that provides encryption for entire volumes, addressing the threats of data theft or exposure from lost, stolen, or inappropriately decommissioned devices1. BitLocker is available on supported devices running Windows 10 or 11 Pro, Enterprise, or Education2. Windows 10 Home does not support BitLocker3, and Windows 10 Embedded is designed for specialized devices and does not offer BitLocker as a feature4. Therefore, the most appropriate Windows 10 edition for a single user who wants to encrypt a hard drive with BitLocker is Professional. References1: BitLocker overview - Windows Security | Microsoft Learn2: Device encryption in Windows - Microsoft Support3: Can You Turn on BitLocker on Windows 10 Home?4: How to enable device encryption on Windows 10 Home

Explanation: Open-source software is software that has its source code available for anyone to inspect, modify, and distribute. Open-source software is usually free of charge and does not require a license to use. Some examples of open-source antivirus software are ClamAV, Comodo, and Immunet12. The other license types are either not free or not suitable for a SOHO PC. Corporate and enterprise licenses are designed for large-scale organizations and networks, and they usually require a subscription fee. Personal licenses are for individual users and may have limited features or support.

Explanation: Date and time is the most likely cause of the issue. The date and time settings on a workstation affect the validity of the certificates used by websites to establish secure connections. If the date and time are incorrect, the workstation may not recognize the certificate as valid and display an invalid certificate error. Other workstations on the same local network may not have this issue if their date and time are correct. User access control, UEFI boot mode, and log-on times are not likely causes of the issue. User access control is a feature that prevents unauthorized changes to the system by prompting for confirmation or credentials. UEFI boot mode is a firmware interface that controls the boot process of the workstation. Log-on times are settings that restrict when a user can log in to the workstation. None of these factors affect the validity of the certificates used by websites.

Explanation: Reinstalling the application is the best option to fix the intermittent crashing of the application on the corporate smartphone. Reinstalling the application will ensure that the latest version of the app is installed, which may have bug fixes and compatibility updates that can resolve the crashing issue. Reinstalling the app will also clear any corrupted or outdated data or cache that may cause the app to malfunction. The other options are not as effective or appropriate as reinstalling the app. Restarting the phone may temporarily fix the issue, but it will not address the root cause of the app crashing, which may be related to the app itself or its data. Reimaging the OS is a drastic and unnecessary measure that will erase all the data and settings on the phone and restore it to its factory state. This will also remove all the other apps and files that may be important for the corporate use of the phone. Clearing the cache may help to free up some space and improve the performance of the app, but it will not update the app or fix any bugs that may cause the app to crash.

Explanation:
The technician should use dfrgui.exe to defragment the hard drive1.

Explanation:
The type of backup that should be completed FIRST after installing a new backup and recovery system is a full backup. This is because a full backup is a complete backup of all data and is the foundation for all other backups. After a full backup is completed, other types of backups, such as differential and incremental backups, can be performed.

Explanation:
The technician should add the update site to the client’s exceptions list to bypass the proxy. This can be done through the client’s web browser settings, where the proxy settings can be configured. By adding the update site to the exceptions list, the client will be able to access the site and download the software update.

Explanation:
A biometric lock requires an authorized user to provide a unique biometric identifier, such as a fingerprint, in order to gain access to the server room. A badge reader requires an authorized user to swipe an access card in order to gain access. Both of these methods ensure that only authorized personnel are able to access the server room. Additionally, video surveillance and access control vestibules can be used to further secure the server room. Finally, a locking rack can be used to physically secure the servers, so that they cannot be accessed without the appropriate key.