Windows 7 & Docker Toolbox Installation

I’m trying to install Docker Toolbox in a Windows 7.0 VM created using Virtual Box. Here are the details:

1 Software-
a) Docker Toolbox: DockerToolbox.exe
b) Virtual Box: Version 5.1.26 r117224 (Qt5.6.2)
c) Windows 7 Professional
d) VT-X/AMD-v is enable on the VM
e) Windows 7 VM has Hyper-V feature enabled

However, when Docker Toolbox is installing, it complains that “…This computer doesn’t have VT-X/AMD-v enabled…”