Nope. Been there. Done that. Not my first rodeo with working with Microsoft OS's. Been working with Windows 7 since June. I had it working at one time but had to repartition the drive to give it more space. Now, after giving the OS 35GB of space to grow into and reinstalling from a fresh wipe, none of the 4 dozen or so drivers I've tried, in many different ways, have worked. I ended up going out and buying a cheap $6 USB audio adapter that works for now. Once Microsoft/Conexant and Realtek get it together finally, I will be able to stop using it. But for now, I'm stuck with it.
I've tried doing all the installs as administrator(I'm the ONLY user of the laptop, why some installs require this when I AM the admin is beyond me), every flavor of compatibility mode, and by just extracting out the actual driver files and copying them to system32\driver and system32\drivers\etc. NOTHING has worked. I've even done driver updates through Control Panel.