windows 7 - How do I Delete Old Audio Drivers

I have installed many inf-modified audio drivers for Conexant 20585 to make the stereo mix appear. (Failed though..)

And now there are so many installed audio drivers in the system driver store.

So, How do I delete the modified/unsigned drivers from my computer?

Summary of the following discuss

1. I want to delete the unused/modified/unsigned drivers, just keep the
   one in use and the signed ones.




2. I expect an easy automatic way to find the unsigned drivers listed in
   the figure.




3. I don't want to read the thousand-lines inf file to manually remove
   the driver files.

Answer

Use pnpuil -e to enumerate all installed drivers and look for the OEM infs which belong to the drivers you want to remove. Now use pnputil -d OEMNumber.inf to delete the drivers.

If you want a GUI, use this tool to remove them:

Run it, select "Enumerate" to get all drivers, select which ones you want to be killed and click on "Delete package".