Please I need some help with this, I got Windows 8.1 pro, and already try everything and nothing happens.

SweetFX doesn't currently support Win 8.1 (DX10-11). It will soon.

I was trying to use this one http://sfx.thelazy.net/games/preset/1911/ But never work. Thanks for help.

I feel a lot more people need to read this, very good info! https://www.youtube.com/watch?v=CjYNReBM0l0