How does a Windows Service differ from regular applications?

A Windows Service is designed to operate in the background without a user interface, which is a primary characteristic that sets it apart from regular applications. Regular applications typically require user interaction and often rely on a graphical user interface (GUI) for operation, where users perform tasks directly. In contrast, Windows Services function independently of user sessions and can start automatically when the operating system boots, providing essential background functionality. This allows them to perform tasks such as monitoring system events, managing network connections, or executing scheduled operations without requiring user presence or interaction.

The other options highlight characteristics that do not apply to Windows Services. For example, constant user interaction is not a requirement or characteristic of services, and services can operate without any visual interface. While Windows Services can be utilized in network applications, they are not limited to this context, as their applications can span a variety of functionalities. Lastly, the idea that services are always visual and interactive contradicts the foundational characteristics of what a Windows Service represents, as they are inherently designed to work silently in the background.