Hello, first, i thank you for your answer. Today, i have tried the latest directx but it doesn't work... Before the first message, i have already try any compatibility modes (windows advise for Windows XP (Service Pack 2)...) or running as admin, they don't work too.. The exact message it gives when i try to launch the installer: I'm french, and i don't find the corresponding english message. It's all and thank you again for your futures responses!