When a user needs to install optional features for a program that is already installed, the technician should: * Go to Programs and Features: Access this via the Control Panel. * Select the program: Find the installed program in the list. * Click on Change: The "Change" option allows modifications to the installed program, such as adding or removing features, without completely uninstalling and reinstalling the program. This method is the most efficient and avoids unnecessary reinstallation of the software, which could lead to data loss or require reconfiguration. Reference: CompTIA A+ 220-1102 Exam Objectives, Section 1.4: Given a scenario use the appropriate Microsoft Windows 10 Control Panel utility. Windows application management documentation.