Downgraded Win8.1 to Win7 and now need help to find drivers

Question

So I didn't like Windows 8.1 and downgraded to Windows 7 64-bit SP1, formatting all the drives in the process. Now I don't have some drivers and I'm not sure which ones to download since there are like 2 indentical types of drivers for everything on the page: http://support.hp.com/us-en/drivers/selfservice/hp-15-g000-notebook-pc-series/6545564/model/7234521
In Device Manager there are 6 things with yellow !s
Ethernet controller
Network controller
PCI Device
PCI Encryption/Decryption Controller
SM Bus controller
Universal Serial Bus (USB) Controller
 I'm not sure if I'm meant to provide the Device ID or Hardware IDs so please tell me to provide whichever ones. 
And also some additional things that I think are related to drivers
Function buttons dont work so I can't change brightness while holding fn + f2/f3. Is that the HP System Event Utility Driver?
"The current video card may supoprt Aero with a driver that is compliant with the Windows Display Driver Model (WDDM)". Do I just the Graphics drivers on the page I put above? And which one? Or doesn't matter?
Also under System Information > Components > Display, is it meant to be generic llike 'Standard VGA Graphics Adapter" Is that what its meant to be or will they have the specific network adapters after I install some drivers? 
Under Components > Modem, there is nothing there
Under Components > Ports > Serial, there is nothing there
Under Components > USB, it says 'Standard Enhanced PCI to USB Host Controller' rather than something more speciifc. 
                     I'm comparing these to my other laptop which has pretty specific things written under those sections so I'm assuming they're to do with the drivers right? I just threw these here in case theres more underlying issues. 
Also how would I go about installing these drivers since the USB ports dont work? Putting the drivers on a CD? 
 I would really appreciate any help provided because without these, my laptop is basically unusable. Thank you so much. 
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Answer 1

Hi:
Yes, you can burn the files to a CD and use those to install the drivers you need.
You need to install the AMD Chipset and USB 3 drivers which are not on your notebook's support page.
http://h20565.www2.hp.com/hpsc/swd/public/detail?swItemId=cp_117181_1
Download and install both of these drivers for the usb...
http://h20564.www2.hp.com/hpsc/swd/public/detail?s​p4ts.oid=6943835&swItemId=ob_139250_1&swEnvOid=40...
http://h20564.www2.hp.com/hpsc/swd/public/detail?s​p4ts.oid=6943835&swItemId=ob_133037_1&swEnvOid=40...
Reboot after each installation.
PCI E/D Controller:  Not on your notebook's support page.
Run this file and then manually install the driver.
http://h20565.www2.hp.com/hpsc/swd/public/detail?swItemId=vc_133833_1
To manually install the driver, go to the device manager and click on the PCI E/D Controller needing the driver.
Click on the driver tab, click on update driver.  Select the Browse my computer for driver software option and browse to the driver folder that was created when you ran the file.
That folder will be located in C:\SWSetup\sp66974.   Make sure the Include Subfolders box is checked and the driver should install.  Then reboot.
Ethernet Controller:
Realtek Local Area Network (LAN) Driver
File name: sp69625.exe
PCI Device:
Realtek Card Reader Driver
File name: sp69619.exe
I don't know what model wireless card your model uses, so if you still need the wireless card driver (Network Controller), please do the following steps so I can figure that out and then I will post the link to the wireless card driver you need...
To find the hardware ID, go to the device manager and click on the device labeled Network Controller.
Then click on the Details tab at the top of the Network Controller window.
Now you see a Property drop down list and it is defaulted to Device Description.
Drop down on that list and select the second item (Hardware ID's).
Post the top string of characters you see in the window.