Hi:
This is a consumer to consumer forum. No one representing HP will respond to any posts here.
If you believe HP should provide all of their consumer PC's with driver support for Windows 7, and what you intend to do if they don't, you may do so at the link below.
https://ssl.www8.hp.com/us/en/company-information/executive-team/ceo-index.html
Your model can be easily downgraded to W7 x64:
Below are the links to the drivers you need:
First, install the AMD chipset driver and reboot. You want the first file listed on the webpage.
http://support.amd.com/en-us/download/chipset?os=Windows 7 - 64
Then, all of the W7 x64 drivers and software from this model should also work on yours, except the wireless.
DO NOT USE ANY BIOS OR FIRMWARE DOWNLOADS FROM THIS LINK
Wireless: This driver should work...