Good Day guys, I just downgrade my HP Pavilion Sleekbook 14pc from windows 8 to win7. I had a problem regarding the USB ports on my laptop. When I plug mouse, keyboards, or other gadget, it has power but my laptop didn't show anything, like installing driver. I tried scanning hardware changes from device manager, I also tried short-circuiting but pulling the power from socket but nothing helps. the other port can read peripherals and is active but the two 3.0 USB ports are not working. I'm open to any suggestions you have. Thanks in advacne guys.