How do I enable VT-X?

You can use the tool Securable from Gibson Research to find out if your hardware supports virtualization extensions. If it tells you that your hardware is supported, but not enabled, check the BIOS settings to enable it.

Start your PC, press F2, go to the security option and enable VT technology.

Your processor does support VT-X, you'll just need to enable it in the BIOS settings. Reboot your computer and press the specified key on the boot screen to go into the BIOS Setup and enable it.