We're currently facing a not too bad case of CryptoWall. We got lucky as it had only affected one computer and possibly a network drive, but from what we've seen never spread beyond that. Anyways, while investigating this problem we got to talking about how we need to get a backup system, preferably one that creates snapshots of the files so that if the latest snapshot is infected it won't infect the other snapshots and we can revert back to the previous snapshot before that. We need to be able to backup both workstations and servers. Any suggestions on a solution that would fit our needs?
Edit:
I guess I should clarify that I don't mean to use actual snapshots of the computers, but just need a backup of the computer in a frozen state kind of like the home edition of Acronis does.