Close the installer, open Task Manager, and kill any python.exe or msiexec.exe processes. Restart the installation as Administrator.
. Please note that Esri has officially retired ArcGIS Desktop as of March 1, 2026 , and recommends migrating to ArcGIS Pro for future support. 1. Pre-Installation Checklist arcgis desktop 10.8.2 download
Choose the option "I have installed my software and need to authorize it." Close the installer, open Task Manager, and kill any python