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A restore point refers to the fixed state of a computer system and data. If a malfunction occurs, a system restore tool uses a restore point to return a computer to an earlier functional state.
A user should set manual restore points before applying system changes, in the event of instability or other issues. System restore copies system configuration and data for backup. Deleted files are restored, but system restore does not affect personal files like photos, documents and emails.
Types of restore points are as follows:
Some OSs set automatic restore points, depending on a computer's purpose and assigned rules. For example, Windows XP creates restore points during the installation of all unsigned/unauthorized device drivers or compatible system restore applications. However, two OSs by the same manufacturer often have major differences. An example is MS Windows XP and MS Windows Vista.
Windows system restore has limitations and complications, as follows:
Restore points are not permanent because the RPLifeInterval registry setting eventually deletes all restore points at predetermined intervals. With dual-boot systems, not all OS changes are monitored, resulting in incomplete system restore execution.