I am experiencing a problem with installing the Windows 7 Beta (Build 7000, I believe) from a USB drive. I followed this tutorial to make the bootable USB drive as I have Windows XP Home Edition and not Windows Vista, like so many tutorials like this out there assume. Before using this tutorial, I was getting a J in the upper-left corner upon attempting to boot from USB. Now, the string "ssing operating system" appears in the upper-left corner. I figure it meant to display "Missing operating system." I tried doing the tutorial over again. No luck. Why is this happening, and how can I fix it?