Kyle uses Carbonite and he has been having corruption issues with his backup. When he tries to restore it, he can't because it's corrupted. Leo says that Carbonite has great support and they use "versioning," with their backups. They often have off site backups that he can't see. Leo recommends calling up Carbonite to ask them if they have his backups in deep storage.
That's a risk with backups of any kind. Hard drives can become corrupt. If he starts with a bad file, then there's really a tough road to hoe to get it back. But if anyone can, Carbonite can.