Enabling Hyper-V on Windows 8.1 PRO

The fastest way to enable Hyper-V on Windows 8.1 PRO is using a shortcut...

Simply open Run window by using Windows key + R then type OptionalFeatures.exe and press ENTER.
Optional Features

Then this window will popup:
Windows Features HyperV
Simply select all the features of Hyper-V and then click OK.

Windows will aplly all the changes we made:
Windows Features - Applying Changes

Finish the process by click in Restart Now
Windows Features - Completed Changes

And that's it... Hyper-V enabled!