Yeah, all of my logs have been about that useful in regards to what, exactly, is failing. (i.e. They all "appear" to fail on installing the USB driver.)
I have probably a dozen USB devices attached to the host I posted the log from. As I said, my other log files are multimegabyte files. So, I need to know which you want to see, so I can trim those ones down to a reasonable size...

And it's almost certainly not a specific USB device, as there are no USB devices which are on all of the failing hosts. So that certainly does not make life easier...
One interesting thing I can note is that the network is never reset on the host during installation, so it's not trying to install the network drivers. As I haven't seen a proper installation on my hosts in a very long time, I do not know for sure whether this is supposed to happen before or after the USB drivers are installed. If it's supposed to happen before, I can tell you that all of the hosts have Atheros WiFi NICs. That's about all that the machines have in common aside from being Intel 64-bit CPUs (even if the OS is 32-bit), and running some flavor of Vista. Oh, that and all the machines have at least 2 gigabytes of RAM. They may all also have Bluetooth stacks installed (probably all Toshiba...), even if they have no Bluetooth radios attached, but I cannot be certain of that quickly.
So, if you can tell me which (or all...) of the setupapi log files you want to see, I'll trim those down tomorrow evening (GMT-8).
