How to Resolve ISTORX32.DLL Error when Starting Outlook?

A corrupt add-in can prevent Outlook from starting or give an error message at startup. Also, it may corrupt your PST. To repair a corrupted PST, Inbox Repair Tool (Scanpst.exe) is the solution. But, if this fails, you should restore the corrupted file from a suitable backup or use a powerful PST Repair application that can repair and restore a damaged PST.

For example, you may receive the below error message when trying to start MS Outlook:

“The add-in :\Program Files\Common Files\System\Mapi\1033\\ISTORX32.DLL could not be installed or loaded. This problem may be resolved by using Detect and Repair on the Help menu.”

The application may start, but you encounter this error at each start of the application.

Cause

The above error usually occurs if the Control Data Extensions Add-in is corrupt. It can also result if this add-in is missing. Microsoft Outlook loads all its add-in components when starting the application. If it cannot find the required add-in at startup, the application prompts the error, stated above.

In some cases, chances are that your Outlook PST is damaged or is suffering from some minor corruption inconsistencies.

Solution

Since Outlook loads the add-ins at startup, you can exclude the affected add-in and restart the application to resolve this issue. To do so, follow these steps:

(1) Click 'OK' to close the error message window.

(2) Next, click Tools (menu) | Options (menu option) | Other (tab).

(3) Click the 'Advanced Options' and then 'Add-In Manager.

(4) To exclude the affected add-in, click 'Control Data Extensions' check box to clear it.

(5) To save the settings, click 'OK' and restart the application.

If you notice the Outlook PST corrupted, you can use Inbox Repair Tool (Scanpst.exe). It is a hidden file. So, make sure you enable the view of hidden files and folders before locating the tool. In case, the tool fails to repair the corrupted file, you need to opt for more powerful Outlook PST Repair utility. A third-party PST Repair application can repair and restore a corrupted Outlook PST using intensive scanning algorithms.

Stellar Phoenix Outlook PST Repair is an effective Outlook PST Repair application that repairs a corrupted PST and safely extracts all file objects, which include e-mails, notes, contacts, calendar, journal, appointments, and tasks. The safe PST File Recovery application is compatible with MS Outlook 2007, 2003, 2002, and 2000. The software provides a 3-pane structure to preview the messages.