How to fix Hyper-V error “Failed to add device Microsoft Synthetic Ethernet Port”

Hyper-V Beta, and RC0 worked great.  I recently upgraded to RC1, and in the process of both trying to move a VHD from another server and trying to create a new VM from scratch I repeated received the following error:

Failed to add device ‘Microsoft Synthetic Ethernet Port’

Here’s what I figured out: The Microsoft Forefront Client Security that was running on the host machine was interfering.  Once I excluded both .XML and .VHD files in Forefront, everything started working again.  That was an easy fix.

SQL Server 2008 RC0 is available for public download

Surprisingly, I haven’t heard much buzz around this, but SQL Server 2008 RC0 is now available for public download at this link.  I haven’t had a chance to look at it yet, but supposedly this is the final release before RTM later this year.