Is it mandatory to enable hardware-assisted virtualization support in BIOS before installting Hyper-V Server 2012 R2?

Hi,

I recently installed Hyper-V Server 2012 R2 on my PC. CPU is i5 3rd generation and it supports hardware-assisted virtualization. However, I didn't realize that until after I finished installing the Hyper-V server.

I can still enable it in BIOS. The question is, if I enable the hardware-assisted virtualization support now, is it sufficient?

If not, do I have to enable this in BIOS and install the Hyper-V Server OS all over again?

Please clarify.

Thanks