I’m trying to install Windows (Vista first, for a multiboot machine) from a USB drive. I’ve tried USB 1, 2, and 3, and I get to the GUI portion of setup, and a window pops up and gives me the error message in the subject line. It repeats this message every 4 seconds, and after a few of those it tells me to pull the USB drive for 5 seconds and plug it back in. Then it goes back to the repeated error messages. I’m using a program called WinSetupFromUSB. I suppose I should have tested it before putting 15 different operating systems on my flash drive. :D