There are several options to protect your investment in Windows and Fusion, both within and outside of the VM. Snapshots, anti-virus, encryption, shared or mirrored folders, and backups are all great ways of keeping your data safe, but there are some considerations to be made when thinking about your VM's protection.
The way I see it, there are two main things that need protection: Your VM and Your Data.
Your VM means Windows system files and installed applications; the "virtual computer" itself, if you will. Your Data refers to the stuff inside Windows that matters most to you: your documents, files, pictures, and so on.
AutoProtect is a feature for automatically taking snapshots, so you don't have to ...