Even though 10.8.2 is the final release, you may need to install post-release patches. Check Esri Support for:
You have the software installed. Now, optimize it for your workflow. arcgis desktop 10.8.2 download
Cause: Corrupted Windows Installer registry keys.
Solution: Run Microsoft’s msizap tool or manually clean the HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders registry path. Alternatively, create missing folders like Documents\ArcGIS. Even though 10
Open ArcMap > Geoprocessing > Environments. Set your workspace to a file geodatabase on a local SSD for maximum performance. You have the software installed
Users downloading ArcGIS Desktop 10.8.2 must be aware of the product lifecycle status: