Instructions
Go to the Cheat Engine website at cheatengine.org. Click the "Downloads" link on the left side of the page. Click "Download Cheat Engine."
Click "Save File" in the download dialog box that appears for Firefox and Opera users. Choose a folder in which to place the Cheat Engine installation file and click "Save" to download the file. If you are using Internet Explorer, click "Run" in the dialog box.
Wait for the install file to download. Once it completes, the installation wizard will appear automatically for Internet Explorer users. All other browsers require you to find the file on your hard drive and double-click it to start the installation process.
Follow the prompts to choose the features you want and install the Cheat Engine. The program will require you to restart your computer to complete installation.