The last changes made to the VirtualBox script is the addition of the option I/O ACPI.which seems required for x64 building http://theoven.org/index.php?topic=576By disabling "enable I/O ACPI" checkbox, you have the same script as before.
I build win7x64 on a wun7x64 machine (no win8 stuff), but it works fine for me. I am a newbie at this (long time {former} BartPE user) and it didn't work for me at first. But I updated my virtual box to the latest one and had then hacked the script to add the "enable I/O ACPI" along with a couple of other options in order for it to boot in the VM. Not at home now, so can't reference my changes right now - but in order for it to work on my Win7 x64, I had to have the ACPI option on. Are you saying that the win7x64 build does not boot unless you start it manually from virtual box?Currious...are you able to build the win8 from win8 source ON a win7 machine?
As I thought about this, perhaps there is something amiss in how the script forms the command line when call the vbox manager.I just ran the script on my machine and zipped the html version of the log. Maybe it can help?
Starting again as my login expired..
Maybe Galapo can increase the default timeouts, which seems short indeed.
To avoid disconnect, you can click on the login link at the top right and on top of the login button.and choose the time to stay connected or Always stay logged.