Definition - What does System Restore mean?
System restore refers to a recovery tool that allows users to back up a system to a certain previous point in time. The term "system restore" is commonly recognized as a Microsoft Windows feature in operating systems, beginning with Windows ME in 2000.
Techopedia explains System Restore
In system restore, the computer regresses various items including files, applications, registries and settings, in order to help users deal with different kinds of operating system problems. Users create a restore point that resides in a particular setting in order to try to navigate various types of system corruption or other problems that can be solved by essentially "moving backward in time" relative to the computer system.