When you downgraded (upgraded in my mind) to Windows 7 you need to forget about Windows 8 drivers. Just leave your automatic update on and Microsoft will load the proper drivers. It just takes time. By the time Windows 7 is fully updated....everything should work normally.
I've done nearly a hundred of these "downgrades" to Windows 7 on many different makes and models of Windows 8 laptops and desktops and they all work perfectly. I believe your laptop model also had a Windows 7 64 bit available if that will help you.