Windows 7 also has the same backup engine. Control Panel>Backup and Restore
Essentials uses the same engine on windows client machines to maintain its backup set of client computers.
It's also on Windows 8 and Windows 10. It's pretty barebones with no email notifications or anything. Even the restore is barebones. It's still way better than just a file backup. Backup assist actually uses it in their software too. Makes the same calls to the built-in VSS writers in Windows. Solutions like Acronis developed their own VSS writers.