Quote Originally Posted by 1mmika View Post
I'm running an nvidia gtx 780 and was also having this problem, tried pretty much all the same troubleshooting as everyone else. Finally got it to work after finding a reddit post which said to go back to an older driver! For some reason the newest 475.06 was causing the launch issue for me. My current driver is 456.71 but the reddit OP used 471.96, along with a few other people saying that this version worked for them, hope this helps!
Thank you so much!!! This worked for me too. Haven't tried newer versions yet, maybe I will later on.
For anyone interested, I believe the aforementioned reddit post was this one, by Hagio.

Many thanks also to Tiakira_Yakumo, who managed to track the error up to ffxiv_dx11.exe. Here's hoping this will help correcting the bug, so we can properly update the drivers again (they're security fixes after all…).