Rhaervis,

No changes were made to my system, no. Same hardware, and normal software updates to Windows and other device drivers.

I've tried those other recommendations as well, and still have the DirectX 11 errors occur randomly. To be specific, I've run the game with only FFXIV and Windows running, no other applications. I don't use any mods, and I've tried with just mouse and keyboard connected, no other USB devices.