d3dx9_43.dll is Missing

This is actually a two fold issue for my specific case.

My issue: Launching a game like World of Tanks or some other game that requires D3DX9_43.dll crashes with a cannot be found error

My sub-issue: When attempting to install DirectX Redistributible the error is given "directx an internal system error occurred"

How to fix it:

First you will need the DirectX redistributible: Get it here

Second, if you get the sub issue I had, you will need to modify the registry. Go to:

HKLM>Software>Microsoft>

IF a sub directory called DirectX does not exist, create it. If it already exists, modify the code called "version" to be anything other than what it is. I changed it to "installedversion" and re-ran the installer which then completed successfully.