Download XInput DLLs (xinput1_x.dll etc.)

This page hosts XInput DLLs. If you need d3dx9_xx.dll or d3dx10_xx.dll, you need the D3DX DLLs page.

Download

Check the error message carefully, because the filenames are quite similar.
All the DLLs are compressed into ZIP archives to save bandwidth. To install a DLL, extract it from its archive, and place it in your C:\WINDOWS\SYSTEM32 folder (or equivalent). If your PC doesn’t know what to do with ZIP files, install the free archiving tool 7-zip.
These files are hosted here without permission from Microsoft, and will be removed if anyone important complains.