For most of its back-end server products Microsoft also offers a so called Best Practices Analyzer (BPA): a scan tool that examines the environment and returns the list of configuration mistakes that could be fixed.
There’s one for App-V 4.5, and now there’s one for Hyper-V 2008 R2 too (at least for the version that is included in Windows Server 2008 R2).
The free tool analyzes the configuration of Windows, of Hyper-V (including its virtual networking and virtual storage) and of existing virtual machines:
