Edit: merged both your replies into one:
in DS4Windows, press "stop" which will stop the driver. then check the box labeled "hide DS4" and then press the button labeled "start" to start the driver back up. this will fix the issue you are having.
the main problem is that NFS is detecting some of the inputs from the controller, as well as the DS4 tool, and they are conflicting. Hope this helps
I hope this clears up how to use DS4 on NFS PC!
