Since your laptop came with Windows 8 out of the box, the drivers listed on HP website are for WIn 8 and 8.1 only. Did you try the "Scan Now" option on HP website to automatically check for missing drivers? Or when you try installing the Win 8 drivers try running it in compatibility mode with Windows 7. And if you have existing drivers that are installed but not working, uninstall them first from Device Manager and then try installing again.