Driver problems after downgrading from 8.1 to win to Win 7 Home Premium

I have both nine HP Pavilion serialnr PC laptop 15-n255eb:[under the direction of privacy] productnr: G2A26EA OC Windows 8.1 with a startup DVD of Windows 7 (x 32 bit) installed CD for install Windows 7 Home Premium after initial start-up of earn 8.1 first. now Windows 7 Home Premium is running on my laptop but nothing works, I have no drivers for Bluetooth controller, PCI device, SM-buscontroller, Networkcontroller and Ethernet controller, USB and Videocontroller controller. even if there is NO WAY I can go online with you laptop, the driver for DVD - / CD-rom station is missing and insertion of a DVD is not identified.

What can I do? I don't have a CD to repair and even if I had one that I can't run on my laptop.

Hello:

Here are the links to the drivers you need, except the wireless and bluetooth.

Download them from another PC, burn it to a CD or copy it to a USB key and use it to install the drivers on your new PC.

First, install the amd chipset driver and restart.  You want the first file on the Web page.

http://support.AMD.com/en-us/download/chipset?OS=Windows 7-64

Then, install the beta amd catalyst driver and restart.

http://support.AMD.com/en-us/KB-articles/pages/latest-catalyst-Windows-Beta.aspx

Audio: Accept the agreement, download and install the driver for the second on the list. "

http://www.Realtek.com.tw/downloads/downloadsView.aspx?langid=1&PNid=24&PFID=24&level=4&Conn=3&DownT...

Ethernet: Download and install the driver for the second on the list.

http://www.Realtek.com.tw/downloads/downloadsView.aspx?langid=1&PNid=14&PFID=7&level=5&Conn=4&DownTy...

USB 3.0: Install both.

http://h20565.www2.HP.com/portal/site/hpsc/template.page/public/PSI/swdDetails/?sp4ts.Oid=5359417&SP...

http://h20565.www2.HP.com/portal/site/hpsc/template.page/public/PSI/swdDetails/?sp4ts.Oid=5359417&SP...

Card reader:

http://h20565.www2.HP.com/portal/site/hpsc/template.page/public/PSI/swdDetails/?sp4ts.Oid=5359417&SP...

3D Driveguard:

http://h10025.www1.HP.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-124661-1&cc=us&DLC=en&LC=en...

Webcam:

http://h10025.www1.HP.com/ewfrf/wc/softwareDownloadIndex?softwareitem=ob-127341-1&cc=us&DLC=en&LC=en...

For the wireless and bluetooth, please this and I'll post the links to drivers, you need for those.

Click the network controller device. At the top of the network controller window, click the Details tab.

Now, you see a Description of the list system default list drop-down property.

Drop down on it and select the second element (Hardware ID).

Now, you see 3-4 lines of characters, the upper line starting with PCI\VEN.

After this first line of characters.

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