What term describes a condition in which all user settings are erased upon logging in?

The term that best describes a condition in which all user settings are erased upon logging in is "stateless." In a stateless environment, the system does not retain any information about the user between sessions. Each time a user logs in, the system treats that session as a completely fresh one, without any previous user configurations or settings saved. This approach ensures that there are no residual settings from prior sessions, making it ideal in scenarios where privacy or security is a top priority.

In contrast, a stateful environment maintains user settings and preferences throughout sessions, which is not applicable in this case. Persistent systems save the user data across sessions, allowing users to return to their previous settings, while dynamic environments often refer to systems that can change or adapt during operation but do not specifically address the retention of user settings.