The G4500 supports virtualization, the T4400 does not. If there is no setting in the bios to turn it on, then contact e-machines.
You cannot upgrade from OpenGL 2.1 to 4.6 on your T4400. Your graphics driver has to support it, which it does not.
For the G4500, OpenGL 4.5 is supported in the HD 530 graphics.
Your T4400 is from 2009, and not of much use in today's world.