Installing Windows 7 in Place of Windows 8

You can use "Driver Genius Professional" to detect the missing drivers and install the latest versions.
To identify missing drivers use Unknown Device Identifier

Is the laptop connected to the internet by ethernet cable?
Windows 7 should search and download appropriate drivers itself if they are available.
It is doubtful that all the hardware of this machine is brand new, so there should be drivers available for it somewhere.
Whenever I have installed Windows 7 I just use the drivers that it finds and installs.
Any luck with that?

If you can identify each system component, the manufacturer and it's version, you can go to that manufacturer's site and see if Win7 drivers are available.

- Windows 7 will likely have many of the drivers, and if you let it run Windows Update (for additional products) it may find others.  
- Windows 8 drivers may also work for Windows 7.
- You can also use Windows 7 drivers from systems using the same devices on which HP does support Windows 7.
- You can get them from the various device manufacturers' websites (Intel, Realtek, Broadcom, etc.).

While I don't believe in using tools such as Driver Genius and Driver Detective - and I have not used Unknown Device Identifier, you can get the ID of the device by going to Device Manager (right-click [My] Computer, Manage), right-clicking the device, Properties, Details tab, change dropdown to Hardware Ids, and get the VEN (vendor) and DEV (device) ID's to assist you.  Sites such as pcidatabase.com can help point you in the right direction of the device's driver (make/model, etc.).

The biggest problem I had is that there were no network drivers, so going on line on that computer was not an option.  Also the device configuration in HP and also from device manager were only generic.  So I could not determine the identity of the devices to get the device manufacturer for their driver.

I was able to sort out the Wireless LAN device by looking at the adapter.  The model label was not a very useful identification in itself, but I found in an online forum an alternate designation for that device that let me find a Windows 7 driver.  So now that that is installed, it will make getting the other drivers easier.

I am still working on this problem, and I will post results later.

Thanks for all inputs so far.

Post the VEN and DEV ID's for any other devices you need.

To resolve the network driver issue, I suggest disabling the onboard nic in BIOS and adding a Nic to the server that has Win 7 drivers.

tg ... you realize this is a laptop, right?

Have you made any progress?

Graycase:  Thanks for your advice.  Good lesson learned here.  I will make that the procedure for future OS changes.<br /><br />Mcsween:  Thanks for the driver references.  I used the Realtek one to get my wired LAN adapter set up.  I had previously found the WiFi and video, and I did not need Bluetooth.  I still had the USB 3.0 controllers to do.  Windows Update did not install them.  After much search I found them as part of the generic AMD chipset drivers on the AMD site.<br /><br />This project started because someone asked me to remove Windows 8 from a new computer and install Windows 7.  I first had to get past the GPT partitioning and create a UEFI bootable disk.  I managed to do that but the device drivers turned out to be a bit harder.<br /><br />I appreciate all the inputs, especially from Graycase and Mcsween, who understood my problem and were helpful in getting the problem solved.