I'm trying to transfer from my old Vista machine to my new Windows 8 one.

Everything stalled, most of the way through, with the following window:

Protected Content Migration

type the password for your old computer

The password that I use on the old computer when powering up or returning from screen saver does not work, nor do the two or three variations of my standard low-security password, nor do the obvious Password or hitting enter on a blank pw line.

Searching this forum, I found a post with an identical problem, back in 2008 when transferring TO Vista... but they did not get any answers.