I too have installed Qubes 3.2 on a DELL Latitude E6410.
For me however it worked with the default BIOS settings and enabling
everything under "Virtualization" except Intel Virtualization Technology
for Directed I/O (VT-d). The issue with VT-d was that the Intel graphics
wouldn't work as documented here: [1]
Have you been able to get WiFi to work?
I tried installing broadcom-wl in the fedora-23 template but ultimately
failed. So I solved my WiFi issue by purchasing a $44 IOGEAR
Ethernet-2-WiFi Universal Wireless Adapter [2], which is probably the
better option anyway if you don't want to install packages from outside
the qubes repository.
/Sven
[1]
https://www.qubes-os.org/hcl/#hardware-laptops
[2]
https://www.amazon.com/IOGEAR-Ethernet-2-WiFi-Universal-Wireless-GWU637/dp/B018YPWORE/