I installed clean via USB flash this morning, Win 7 Ultimate.
Expanding files was stuck at 0% for a few minutes. So, I unplugged a single USB device and install proceeded. All readers take note of this SF learned 'fix'.
That is when I noticed that my DVD drive was spinning. I had neglected to remove the DVD after copying it to the thumb. I ejected the drive and the install interrupted.
Even though I specifically selected to boot from the thumb (via F8), I was indeed installing from the DVD. I did not recv the standard 'Press Any Key To Boot From CD/DVD'.
I am not willing to perform any tests on this at this time. A new clean install is likely in my near future as I continue to test VMs and other apps. But, I am curious. I will assume that I did not deviate from the process described above. I was neither tired nor stoned. I specifically selected to boot from the thumb.
Did Windows install see the DVD and make a jump from the thumb to the ODD?