2 pen drive ports are notrt is working in my laptop 1 po working instead

Hello,
i purchase my laptop 5 months earlier with windows 7 basic as operating system but 2 months earlier i upgraded my operating system to windows 7 ultimate but after upgradng it through a shop i noticed that my laptop's 2 ports are not working and only 1 port is working
so what should i do?
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More about drive ports notrt working laptop working instead
  1. Could be a missing driver. Do you see any "!" in device manager?
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