Here’s a step-by-step guide to get the for Windows 10 64-bit .
If you see "DirectX 12" but some older games (like Bioshock or Fallout 3 ) complain about missing d3dx9_xx.dll , you need to run the offline installer again. The offline cache includes these legacy files; the web installer often misses them. directx 12 windows 10 64 bit offline installer