Error dxgi.dll: If you crash the game and got an error on dxdi.dll (especially on x64), it is likely that there is a conflict with a running Fraps, enough to close it.
Error d3d9.dll: If before starting the game, there are many times the error on d3d9.dll (especially on x64), which in principle does not prevent the launch of the game and SweetFX in it, but if you want to get rid of this annoying error, it is likely a problem in the prescribed GeForce Experience, uninstall the software eliminates the error.
I hope this post will be useful to someone.