Microsoft has launched a beta version of a security accelerator for Hyper-V. You can find it on Connect. It is a beta so don’t use this on production systems. You also need to be wary of breaking the ability to manage the host using VMM and OpsMgr.
“The Hyper-V Security Guide focuses on three key areas:
- Hardening the Hyper-V server role
- Virtual machine management and delegation
- Protecting virtual machines”