Once you have used your download link and saved the .exe file to your computer, follow these steps to install:
Before you trigger the download, ensure your hardware can handle the software. While 10.8.2 is highly optimized, it still requires decent specs: download arcgis desktop 1082 link
The installer will ask where to unpack the files. Choose a location and click "Next." Once you have used your download link and saved the
Ensure you select version 10.8.2 from the dropdown menu. " click "Authorize Now
Select "Advanced (Single Use)," click "Authorize Now," and enter your EVA or ESR authorization code provided by Esri.