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What is System Restore in Windows operating systems?

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Comments deleted as noise. The correct method of handling these question is the one used by mehper. If Wikipedia should no longer exist the content is preserved here, and this has happened with a few sites in the past. If this is to be debated further, please take it to MSE –  Diago Nov 4 '10 at 14:52

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System Restore is a component of Microsoft's Windows Me, Windows XP, Windows Vista and Windows 7 operating systems that allows for the rolling back of system files, registry keys, installed programs, etc., to a previous state in the event of system malfunction or failure.

In System Restore, the user may create a new restore point manually, roll back to an existing restore point, or change the System Restore configuration. Moreover, the restore itself can be undone. Old restore points are discarded in order to keep the volume's usage within the specified amount. For many users, this can provide restore points covering the past several weeks. Users concerned with performance or space usage may also opt to disable System Restore entirely. Files stored on volumes not monitored by System Restore are never backed up or restored.

System Restore backs up system files of certain extensions (.exe, .dll, etc.) and saves them for later recovery and use. It also backs up the registry and most drivers.

Source: Wikipedia

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