If it is of any help, I have a HP ProBook 4740s which did this when I plugged in a powered USB hub. It turned out to be a dud hub and when I replaced it, no further problems.
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If it is of any help, I have a HP ProBook 4740s which did this when I plugged in a powered USB hub. It turned out to be a dud hub and when I replaced it, no further problems.