Device Manager has a bang on USB-IF xHCI USB Host Controller on Inspiron 7720, 7520

Problem:             DevMgr has a bang on USB-IF xHCI USB Host Controller on  Inspiron   7720, 7520


Resolution:Downloaded the ff.:iusb3hub.infiusb3xhc.inffrom http://plugable.com/2012/12/01/windows-8-and-intel-usb-3-0-host-controllers


And paste in on the Usb extracted folder location under Dell > Drivers > Usb 3.0 Extracted Folder[Intel(R)_USB_3.0_eXtensible_Host_Controller_Driver\Drivers\Win7\x64\]