Final answer:
In Windows 10, software installation generally requires administrator privileges to protect system integrity. Other listed activities, like file deletion, screen brightness adjustment, and internet browsing, do not typically need such permissions, although some exceptions exist.
Step-by-step explanation:
In Windows 10, certain operations are restricted to users with specific privileges to secure the system and maintain its stability. Among the options provided, software installation typically requires administrator privileges. This is because installing software can affect the system's files and settings, potentially impacting all users of the machine and the security of the system. Therefore, to install most software, a user must have the necessary permissions to ensure that the installation does not pose a threat to the system's integrity or to other users. Other options like file deletion, screen brightness adjustment, and internet browsing are normal user activities that usually do not require elevated permissions, although there may be specific situations where restrictions apply (e.g., deleting system files or files owned by other users).