Maybe because you don't have all the necessary asr files in your unit. Which map is it, EU NT or NTU? BTW, dasilvarsa and i weren't referring to you, we were commenting because it was refreshing that someone had actually not formatted unnecessarily and followed the suggestion to delete the offending file(s) before formatting.

With the preboot access for your 2460, try this next time: Hold the upper LH corner as you look at it, THEN plug the usb into the unit. If you've got updater.exe open on your desktop with the usb option already selected, immediately you see the unit details appear in the window adjacent 'USB Device' click OK.