Fixing "The prorgram can't start because d3dx10_43.dll is missing from your computer. Try reinstalling the program to fix this problem." System Error
Install the DirectX End-User Runtime
Go to http://www.microsoft.com/downloads/en/confirmation.aspx?FamilyId=2DA43D38-DB71-4C1B-BC6A-9B6652CD92A3&displaylang=en to download the DirectX installer.