Usb Ports are not working

Iam using Lenovo Z580. I had the OS windows 8 64 bit. I have installed all the drivers needed in device manager. But two ports out four of my system is not recognizing any pendrive Or hard disk . I got this problem when i had installed windows 8 in the system.I installed the drivers using Driver max. all Other things are working normally
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More about usb ports working
  1. what type of USB port? USB2.0 or USB3.0
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