Uninstall.
Unplug
Restart PC.
Run scan disk on your hard drives.
Restart.
Download and install and run cc cleaner
Clean up your registry. Do this several times.
Run command prompt as admin
Type SFC /scannow
Wait. Restart if errors found.
Run windows update several times.
Update to latest chip drivers for motherboard
Download latest BIOS for motherboard and install.
Download latest 64 bit drivers
Download latest firmware if exists.
Install drivers.
Plugin Device
If working get straight onto updating firmware.
If not working you could try buying a cheap USB card. 50 percent chance it will work.
Another thing to try is a complete reinstall of windows.CLEAN install. Get a backup strategy going on. Windows 8 has better backup software than previous versions consider upgrading.