I run ACAD 14 on my Windows 7 Pro machine using Microsoft's free Virtual PC software. Check out Microsoft's Windows XP Mode page, http://windows.microsoft.com/en-us/w...e-in-windows-7
It sets up a virtual computer in software in which you have WinXP and can install and run ACAD14.
ACAD 14 runs just like it should, but I still usually use my older XP machine for ACAD work since it's in my shop/mancave.
Googling "microsoft xp virtual PC" might help, and offers some hope of installing on Windows 8, though I've not tried that.