Like the other BPAs that are built-in to Server 2008 R2, this one is available from within the Server Manager. It allows you to launch and review an analysis of how you have Hyper-V configured, so you can see where your configuration meets (or does NOT meet) known best practices; and giving you hints on how to resolve those configuration practices that may be “less-than-best”.
“Sweet! How do I get it?”
You can read about it here: http://support.microsoft.com/kb/977238 and download it from here: http://www.microsoft.com/downloads/details.aspx?FamilyId=89d80c15-0082-4fef-a4fc-fefa463bed08.
Big thanks to Ben “Virtual PC Guy"’ Armstrong and his post about this. I saw it there first.