System Restore is a recovery feature in Windows that allows users to revert their systems to a previous state by creating snapshots of the current configuration. It captures crucial system components such as Windows system files, Registry settings, device drivers, and installed applications, but does not back up personal files. Windows automatically generates restore points during significant events or after a week without new points, and users can manually create them before making substantial changes. Restore points occupy hard drive space, and the oldest points are deleted when storage is full. To use System Restore, users can configure it in the System Properties window, create restore points, view and select restore points, preview changes, and initiate the restoration process. After restoration, the PC reboots, and users should check if issues are resolved.