Well, to be honest i have no real trouble now that i've had the practice. It's really all about technique and speed because you have to do it all in a matter of seconds, maybe 10 all-up before it'll exit preboot and start the calibration mode. Have the usb cable already connected to rear port of PC. Hold unit upside-down in your left hand, left thumb firmly in the unit's extreme top RH corner [now lower left], have updater open and visible, USB cable to hand ready to plug in. Slide switch to on then very quickly back to lock, the instant the logo appears plug in the mini-usb [it's easier to do if the unit's inverted 'cos you can easily see the socket], watch updater and hit enter or click OK the instant you see the unit details appear. That way you'll get it i'm sure, works for me better than fussing with finger pushing anyway. You can let go of the screen when 'Loader' appears of course.