I have xp for my laptop os, with the appropriate service pack update. I didn't think to note if the update stops at the same exact time but it does start in for a few moments before quitting. The wizard says it should only be about 20 min but before my update stops it's sometimes all the way up to 500+ minutes, but maybe that doesn't mean anything. The tablet is off when I connect it with the usb cable, then I turn it on as directed. The wizard recognizes the tablet and starts the update but it stops, and the retry button appears. It does say failed but no specific error message.