This is the most commonly used method and is similar to installing any other MS Windows software.
1. On the download page, click Installer (32BIT)
2. You will be offered the standard Run, Save, Cancel options.
3. Once downloaded, installation will commence automatically if the Run option was selected, or you will need to double click the downloaded file if the Save option was selected. Once installation commences, simply follow the steps as shown on screen. For most users the offered default settings are sufficient, if not, change them accordingly if you are sure you have to.
This is only one of the ways, you can also refer to other articles for more help.