What is system restore used for?

System restore is primarily used to revert system files, programs, and settings to a previous state, effectively undoing any changes that may have caused issues or instability within the operating system. This functionality is particularly beneficial when software installations, updates, or system changes lead to problems like crashes or performance degradation.

This process involves creating restore points at designated intervals or before significant changes, allowing users to roll back their systems to a specific configuration without affecting personal files such as documents or photos. Restore points serve as snapshots, ensuring that users have the option to return to a known good configuration, which can be invaluable for troubleshooting.

In contrast, upgrading hardware components relates to physical changes in the machine, deleting unnecessary files addresses storage optimization, and increasing storage capacity deals with adding more disk space, none of which pertain to reverting system files or maintaining system stability.