Hyper-V - Configuration - HP Proliant Servers BIOS Settings
Just a quick note on BIOS settings required for HP Proliant Servers. If you receive an Event ID: 14098 within the Hyper-V Manager ('Hypervisor' driver required by the Virtual Machine Management service is not installed or it is disabled. Check out your settings or try reinstalling the Hyper-V role.) check the following items.
Within the BIOS, enable the following:
"No-Execute Memory Protection"
"[CPU Mfg] Virtualization Technology" (Can be Intel or AMD)
Save with F10.