Final answer:
To modify the settings of a task in Event Viewer, you should use the Task Scheduler in Windows 10. The Task Scheduler allows you to modify the properties of scheduled tasks such as Action1.
Step-by-step explanation:
To modify the settings of a task named Action1 that is attached to a specific event in the Event Viewer on a computer running Windows 10, you should use the Task Scheduler. The Event Viewer itself allows you to view events and attached tasks, but to modify an existing task or create new tasks based on event triggers, you would use the Task Scheduler, which is a Windows feature that enables you to schedule automated tasks on your computer.
You can access the Task Scheduler by searching for it in the Start menu or by opening the Control Panel and navigating to Administrative Tools > Task Scheduler. Once open, you can browse to the Library where scheduled tasks are listed, find Action1, and modify its properties, including triggers, actions, conditions, and settings.