What I have noticed...
Roll back drivers & updated with driver genius pro. Both a No-No in my view. Drivers need to be completely uninstall, and instances from the registry must be cleaned or gotten rid off. There is also PshyX to consider here. Patches for both games, IIRC, WAW had an audio issue that hindered gameplay and FPS, was that fixed?
What I would do? Download latest Audio & Video drivers for your specs and save on a temp folder. Uninstall drivers, uninstall PhysX, clean registry on safe mode, restart and install new drivers with higher admin rights (Right click files and use "Run as Administrator")