Hi:
You can only run W10 on that model and have everything work right.
Reinstall W10 and download the drivers below.
Then when you reinstall W7, let it install over the W10 installation and it will create a windows.old folder.
Find where you saved the drivers on the W10 installation's window.old folder and run them from there.
You can see if these W7 drivers work for you...
Chipset: Download, unzip and run the setup application from the link below...
https://downloadcenter.intel.com/download/28182/Chipset-INF-Utility?product=1145
Graphics: See if the modded W10 driver works for your model too...see Bruce BTS' post.
https://h30434.www3.hp.com/t5/Notebook-Video-Display-and-Touch/Windows-7-VGA-drivers-Probook-450-G4/...
USB: Download, unzip and run the setup application...
https://downloadcenter.intel.com/download/22824/Intel-USB-3-0-eXtensible-Host-Controller-Driver-for-...
Audio: accept the agreement. Download and install the Windows 64 bit driver and restart the PC.
https://www.realtek.com/en/component/zoo/category/pc-audio-codecs-high-definition-audio-codecs-softw...
Ethernet: Download, unzip and run the setup application from the W7 driver at the link below.
https://www.realtek.com/en/component/zoo/category/network-interface-controllers-10-100-1000m-gigabit...
SD card reader: Download, unzip and run the setup application from the 1st file listed at the link below.
https://www.realtek.com/en/component/zoo/category/card-reader-solutions-card-reader-controllers-soft...
Wifi:
https://ftp.hp.com/pub/softpaq/sp88501-89000/sp88574.exe
Bluetooth:
https://ftp.hp.com/pub/softpaq/sp88501-89000/sp88577.exe
