DirectX fatal error 1100000f

[Naeramarth]

Hi,

I have found multiple threads with this error code, but all of them were closed without a solution.

I am getting this error code (1100000f) when trying to launch the application with DirectX 11. It only appears when in windowed/borderless windowed mode and when using alt+tab in fullscreen mode. Which basically means it's unplayable with DirectX 11.

In DirectX 9 I'm getting random crashes and its generally unplayable. Since DirectX 9 is unsupported, I'd like to concentrate on the DirectX 11 error.

Solutions I've tried:
- Reinstall, I also delected the appropriate folder in "My Documents"
- Compatibility mode for Windows 7
- Ran DirectX installer (didn't do anything, since I was already using the latest version)
- Updated GPU driver
- Downgraded GPU driver to older version
- Restarted without any programs in autostart
- Made sure I don't have any overlays active (I never do, since to the known issues they lead to, but I still checked)
- Made sure both executables for ff14 are running on my dedicated GPU (always the first thing I check, unfortunately for me, in this case it was set correctly)
- Unplugged everything attached to the device and ran ff14

specs:
GPU: NVIDIA GTX 1050 (mobile)
Driver Version: 445.87
CPU: i7-7700hq@2.8ghz
RAM: 16gb ddr4 2133mhz
Hard Drive: Samsung 860 EVO (where my game is installed, its my D: drive)
OS: Windows 10
OS Version: 1909 (latest)
Graphics Settings: borderless window, didn't get further
FPS Limit: 60 (my monitor won't do more)

Can also provide logs, dxdiag, msinfo, whatever else, if needed.

Kind regards,
Naeramarth

Edit:
tried addional stuff:
- Hard reset. Deleted everything from all drives and reinstalled windows
- Force 11_0, 11_1, 12_0 and 12_1 using dxcpl
- used 64 bit launcher