Firstly, I suggest you make sure you downloaded the latest version of the program. After you download it, double click the installer (.exe file), click Next, check the I accept the agreement box, select a destination directory, press Next several times and then click Install. After the installation process is complete, check the Launch Cheat Engine 6.4 box and press Finish. If you are asked to try out the tutorial, press Yes and follow the on-screen instructions. If you’re not asked, start the tutorial from the Help menu.