Realtek PCIe Gbe family controller findFile missing error while installing the driver

Model: HP ENVY TouchSmart 15-j052nr

Issue: Downgraded from windows 8 to windows 7 and

1) Issue :

everything works fine except none of the USB ports 3.0 are working. I see one unknown device and it's not able to find the driver.

Unknown Device: Details Column has  Hardword Ids

IUSB3\ROOT_HUB30&VID_8086&PID_8C31&REV_0005&SID_1962103C

IUSB3\ROOT_HUB30&VID_8086&PID_8C31&REV_0005

IUSB3\ROOT_HUB30&VID_8086&PID_8C31

I have tried installing https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=22824 but it didn't help.

2) Issue

Another Issue: Ethernet controller is missing the driver and I am getting findfile failed when I try to install the driver

Realtek PCIe Gbe family controller

Error: http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/findfile-failed-the-realtek-netw...

I tried pluggin ethernet cable while installing the driver also but no result