If you have a program that calls for a DirectX 9 file in Windows 10 or Windows 8, installing the downloadable version (the process above) is the way to solve that problem - it will not "downgrade" your DirectX 10/11/12 install!
Ọ bụrụ na ị nwere mmemme nke chọrọ maka DirectX 9 faịlụ na Windows 10 ma ọ bụ Windows 8, ịwụnye mbipute a na-ebudata (usoro dị n'elu) bụ ụzọ isi dozie nsogbu ahụ - ọ gaghị "downgrade" gị DirectX 10/11/12 wụnye !