John has a Windows 7 PC and is worried that if he gets bit by CryptoLocker, he will lose his backups. Leo says that Carbonite has "versioning" which means it backs up different versions of his data. If his current copy is affected, he can always delete his data and restore from Carbonite. It's not a substitute for protection and behavior, but it's a good last line of defense. If he gets the virus, it's important to also wipe the hard drive, reinstall Windows, and run updates.