Hi:
Maybe some of the W8 drivers will work, but most of them won't.
Install what you can and then please post the hardware ID's for what you can't get installed and I will see what W7 drivers you need.
Please see this guide at the link below for where to find the hardware ID for a device.
http://www.wikihow.com/Find-Hardware-ID
I'll give you some preliminary help...
1. See if installing the graphics/chipset driver from the Lenovo G505, which has the same chipset and graphics as yours.
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS039000
2. Use the drivers and software from the HP Probook 455 G1 (except the graphics and audio). The Lenovo driver above should have also installed the usb 3.0 controllers.
The audio driver you need can be found at the link below. Accept the agreement, download and install the second driver on the list for W7 x64.