Does it only fail to boot when on battery power, or when also on charge? If it only happens on battery power then possibly your battery is near dead.
If it happens on charge, first backup and then try removing whatever file/s you last added e.g. gupdate.gcd, vehicles, keyboards, voices, map image, whatever. If it still won't boot format it with [Only registered and activated users can see links. ] and then if it boots replace files with MapUpdater/WebUpdater or GE. As it's visible in windows you shouldn't need to cure it. Read the initial post fully first please.
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