One sure sign that people are upgrading from Outlook 2007 to Outlook 2013: I’m seeing more complaints about a script error in Outlook Today.
When you upgrade from Outlook 2007 to Outlook 2013 and then open Outlook Today, you may receive a script error: Line 278. Char 1. Error: "Library not registered." When you click "Yes" in response to "Do you want to continue running scripts on this page?" everything seems to work correctly.
You may also receive an error if you attempt to customize Outlook Today. A yellow banner above Outlook Today will warn you that ActiveX controls are blocked along with a script error ("Unspecified error") pointing to the URL "res://C:\Program%20Files\Microsoft%20Office%2015\root\office15\1033\OUTLWVW.DLL/outlook.htm.
Your web browser has blocked this site from using an Active X control in an unsafe manner. As a result, this page might not display correctly.
The first fix most people try is running a full repair on the Office installation. However, this won’t fix it. The problem is a registry entry referencing an older version of the Outlook View Control that was left behind in the upgrade.
To fix, close Outlook then open the registry editor. (Press Windows key + R then type regedit in the text box and press Enter.)
Browse to find this key: HKEY_CLASSES_ROOT\Typelib\0006F062-0000-0000-C00-000000000046.
Under the key are two keys: 1.0 and 1.1 (Outlook 2016 users will have 1.2 key). You need to delete the 1.0 or 1.1 key, leaving the highest numbered key (Right click on the key and choose Delete). When you reopen Outlook, the script error no longer appears.
Do it for me
If you are unable to edit the registry, you may need to ask your IT staff to delete the key for you. If you have a home computer and are using a standard user account, right-click on the registry editor shortcut and choose Run as Administrator to open it as an administrator. To run the .reg file as administrator, hold Shift then right-click and choose Run as Administrator