“The virtual machine could not be started because the hypervisor is not running.”

I am setting up Hyper-V on Dell PE 2950 with Windows 2008 Enterprise Server. Installed all needed roles and I created the first virtual machine. I tried to start it and I got this error:
“The virtual machine could not be started because the hypervisor is not running.”
What I found out is that in BIOS of this machine, under “CPU information” by default Virtualization is Disabled. All I had to do was to Enable it.

fun as always