I'm sure you guys wanna use the dxgi.dll on a win 8.1 system, right?
Because Windows 8.1 isn't supported yet.
Or it's another injector that interferes with SweetFX. Nvidia's geforce experience, Afterburner, Fraps. You name it.
@TexanWarlord - Must be on your end. SweetFX is fully compatible with Win 7 x64.
Like i said, check if any injector is interfering with SweetFX.
You should also check the .log file and see what it says.
Using Radeon Pro (YES, also for a Geforce) on Windows 8.1 helps in most cases (with Boulotaur2024 64bit). When you used the programm a few times, it's even more comfortable than manually copying the files, also you can upgrade the SweetFx profiles very easy. A Manual can be found following the link: