Advanced Techniques: Diagnosing and Fixing -1603 Error During Smarter Mail Upgrade

This article provides guidance on resolving Smarter Mail error code -1603, even if rebooting and reinstalling the software are unsuccessful.

a) How do I fix installshield error 1603 in Smarter Mail ?

1. First, uninstall Smarter Mail if it appears in Add/Remove Programs.

2. Then, use RegEdit to navigate to the HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products key.

3. After that, click on each GUID in the tree under Products, right-click on it, export the key as a backup, and delete the GUID and its subkeys from the tree to export a GUID with the ProductName value Smarter Mail.

4. Next, run the Smarter Mail installer.

5. Finally, you may need to reboot.

Note: To avoid potential risks when editing the registry, it’s crucial to create a complete backup of the registry and ensure you’re familiar with the process before making any changes.