Microsoft started giving early builds of Windows 8 to ODM and OEM partners Winrumors notes that Microsoft has had similar restore capabilities in its operating system since a function called 'Shadow Copies' was introduced in Windows Vista, which was used by System Restore, but History Vault is set to expand on it and provide a full GUI to make restoring old documents easier. Apple's Time Machine uses the cover flow interface to sort through restore points, but it's not clear what Windows 8's History Vault interface would look like.