December Server 2008 CTP - Hyper-V failing to start!
If like me you installed the December CTP and chose an install language other than en-US and Hyper-V failed to start the sad news is you like me will have to scrap the install and redo leaving the language as US English and change the language and keyboard layout post install and then re-add the Hyper-V role.
Very annoying as this bug was just closed on Connect as resolved with no further info and the RC1 and previous builds for the last couple of months did not behave this way working flawlessly.
Hyper-V apart from this is a dream on my Lenovo X61s with very good performance in my humble.