What feature of Windows allows users to restore their system to an earlier state?

The feature that allows users to restore their system to an earlier state is System Restore. This utility is designed to create snapshots of system files and settings at particular points in time, known as restore points. If the system encounters issues due to software changes, updates, or other modifications, users can utilize System Restore to revert their computer to a previous configuration, often resolving operational problems without affecting personal files.

System Restore is particularly useful in troubleshooting, as it enables users to undo harmful changes while allowing them to maintain their data. It functions by restoring system files, installed applications, and registry settings to the state they were in at the time of the selected restore point.

Other options, like Device Manager, System File Checker, and Windows Backup, serve different purposes. Device Manager is focused on managing hardware devices, System File Checker scans for and repairs corrupted system files, and Windows Backup is used for creating backups of user data and system images, rather than specifically reverting the system state. Thus, when it comes to restoring the operating system to an earlier configuration, System Restore is the targeted solution.