First of all, you need to download the program through the Software Informer application's page, or you can download it directly on the developer's official page (with this download you will know that you will get the last version). Open the setup file. Follow the steps that are indicated during the installation process and in only a few moments you will have it installed on your computer. Moreover, Kaspersky Anti-Virus was released only in a shareware version. So, if you want it with full features and no trial time, you need to buy it.