Rajo

I have trouble,when i try to install heroes 3 i have to get directx 7 minumum,i watched last problem for heroes 3 and one admin give a link and explained how to do things,but i changed windows and grafics,when i go to that link ,after instalation on final page writes that i already have directx then i download directx uninstaller and even that didnt work,i dont know what to do please answer.