The VirtualBox Error "VT-x is not available", appears on a Windows 10 Pro based computer, with a Gigabyte Z370 HD3P motherboard and the Intel Core i7-8700 processor which supports the Intel Virtualization Technology (VT-x). Except of the "VT-x is not available" error in VirtualBox, the SecurAble tool also states that the Hardware Virtualization is not available on the system.