Backup a Virtual Box VM on a Windows Host

[VMination]

Can anyone using VirtualBox on Windows 7 recommend a software product to automatically backup the virtual disk files for a virtual box VM, when the Virtual Box instance is installed on Windows 7 64-bit? I'd like to back it up every night without the intervention of the user, who is not an IT person.

Thanks!

[mpack]

The VM is just a folder on the host, so any old scriptable backup software will do. And a huge backup medium of course.

And this may just have been a poor choice of words, but... you should back up the entire VM as a single entity, not pick and choose disk files.