Issue with Intel Virtualization after installing Hyper-v

Dears,

I have an issue with my HP server (DL380Gen8 with 2690 v2).

After i install Windows server 2012 R2 standard and run an intel tool (Processor identification tool) and SecureAble to check if the Intel Virtualisation is enabled. Both tool is returning with Yes and everything is OK.

But once i install Hyper-v and reboot the server every tool is reporting Intel Virtualisation and Intel VT-X is not available.

I want run some application (Android emulator for app) on couple of Hyper-v VMs which need the technology enabled. So far i don't know how to enable the feature after installing Hyper-V.

I checked with HP and they told me it is enabled in BIOS and Hardware and need to check with Microsoft.

Please help me in sorting this out.

Thanks

Raneesh.A