I want to completely disable directX 11

[Christaras]

I have an old computer and vga graphics card and directx11 seems not compatible with them. Videos play in slow motion and I get the message direct3d could not initialized on Mame even if on dxdiag it's enabled.

I can't find directx11 on the registry, only directx 9.
Installed version 00,00,00,09,00,00,00,00
This is directX9 not 11.

Please help me find and destroy directx11. I want to make DirectX 9 the DEFAULT.
I made GS_DEVICE=Dx9 system environmental variable and nothing happened. I want to disable directX 11 and even wipe out it if it's possible

 

[townsbg]

I found this: Disable Directx 11 | Tom's Hardware Forum