ArcGIS 10.1, 10.2.x and 10.3 users
The ArcGIS 10.3.1 for Desktop setup package is designed to detect and upgrade an existing installation of ArcGIS 10.2.x or 10.3 for Desktop on the target system. The settings for the installation location, license manager (for concurrent use), or authorization information (for single use) are retained in the upgrade. After installation, any customizations, add-ons, or third-party applications previously installed might need to be reapplied. The installation folder cannot be changed for an upgrade.
If you wish to change the installation location, you will need to manually uninstall the previous installation through Add/Remove from the Windows Control Panel before installing ArcGIS 10.3.1 for Desktop in the new location.
Concurrent- and single-use users
Your current authorization will be preserved and reconfigured for 10.3.1 use. For concurrent-use users, ensure the license manager you are connecting to is a 10.3.1 license manager. You can run the ArcGIS Administrator after installation to change the license manager or any other required settings.
ArcGIS 10.0 and earlier users
You must uninstall all ArcGIS products earlier than 10.1 and any third-party extensions or tools from your machine before proceeding with the ArcGIS 10.3.1 for Desktop installation. You must also uninstall your License Manager and install the 10.3.1 License Manager. The ArcGIS 10.3.1 License Manager can serve licenses to ArcGIS 10.x and 9.x installations.
If you are installing ArcGIS 10.3.1 to the same machine, you are not required to deauthorize your single-use licenses. If you have borrowed a concurrent-use license, it is recommended that you return the license before the upgrade process.
Common software upgrade questions
This section addresses common questions about the upgrade behavior of ArcGIS 10.3.1 for Desktop.
Do I need to uninstall ArcGIS 10.1. 10.2.x or 10.3 for Desktop before installing ArcGIS 10.3.1 for Desktop?
No. If you already have ArcGIS for Desktop installed, the setup will automatically upgrade to ArcGIS 10.3.1 for Desktop. Additionally, you can install ArcGIS 10.3.1 for Desktop without having an earlier version of ArcGIS for Desktop installed on your machine.
Do I need to upgrade my ArcGIS License Manager to 10.3.1?
Yes, if your current License Manager is not 10.3.1, you need to upgrade the License Manager. The ArcGIS 10.3.1 License Manager supports all ArcGIS for Desktop releases.
Do I need to reauthorize when upgrading to 10.3.1?
No. Your current authorization will be preserved and reconfigured for 10.3.1 use.
Can I run other ArcGIS 10.1 or 10.2 products on the same machine?
No. This setup will only upgrade ArcGIS for Desktop; therefore, you must run the 10.3.1 setup for any other ArcGIS products that also exist on the target machine.