We sometimes forget with all the focus on Windows 8′s new “Modern” interface, but Windows 8 has a variety of great desktop improvements. One of them is File History, a built-in backup feature that functions similarly to Apple’s much-loved Time Machine. Enable the Windows 8 “time machine” File History, and Windows will automatically back up your files to an external or network drive. You’ll be able to restore previous versions from these backups, whether you’ve deleted a file or you just want to recover an old version of a file.
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Did You Know Windows 8 Has a Built-In Time Machine Backup? (MakeUseOf)
Still using Windows 7? Nothing so simple for you, but check out this video: