Hi!
I'm new to Qubes OS and to this list: I installed QUbesOS on an 64GB USB stick. That took almost 3 hours! (I filed some issues at github, too)
My problem was that I could not find the VT-d setting in the BIOS (see also
https://superuser.com/questions/367290/how-to-enable-hardware-virtualization-on-asus-motherboard/1152970#1152970), and I was not sure whether my PC has it.
So I continued the installation despite of the warning.
It _seemed_ that the installation worked without an error, but there were periodic messages in the installer's journal that didn't look quite right.
Now basically the installed system works (now with Vt-d enabled), but I wonder whether the installation (which seems to launch VMs temporarily) suceeded normally, or whether it's better to re-do the installation (thinking of another three hours...).
Regards,
Ulrich