Clean up Office and Outlook registry settings

Introduction

This document explains how to clean up the registry after installation of Office or Outlook.

This registry clean up could fix problems such as: ZIVVER messages do not load on receipt, an error message appears when sending messages, Outlook crashes, or the plugin is not visible in Outlook after installation.

The above generic problems may be caused by problems with the installation of the plugin, Office or of Outlook. If Outlook has been updated from for example version 2013 to 2016, the registry may still contain old references. These old references can lead to problems in Outlook.

Follow the steps below to remove these remains and clean up the installation. It is also possible to remove and reinstall Outlook. However, the Outlook repair function does not solve this problem.

Office registry clean-up

The following explains how to modify the registry. If you modify the registry incorrectly you can end up with serious problems. Back up your registry before you continue. You can restore the registry if a problem occurs after modifying it.
The table below lists the version numbers corresponding to commercial names of Microsoft Office editions. You will need to reference this table for some of the procedures detailed in this section.
Office version Data
Office 2013 2.6 & 2.7
Office 2016 & 2019 2.8

2.6 and 2.7 are okay for Office 2016 as well, if there is a reference to Office16 under 2.7.

Use the Windows Registry Editor to clean up the remains of old installations.

  1. On your keyboard, simultaneously press the Windows logo and R keys.
    A Run screen opens.
  2. Type regedit in the search box.
  3. Click OK.
    Windows Registry Editor is started.
  4. Navigate to the following location:
    HKEY_CLASSES_ROOT\TypeLib\{2DF8D04C-5BFA-101B-BDE5-00AA0044DE52}
    Or, if you are using a 64-bit system, to HKEY_CLASSES_ROOT\WOW6432Node\TypeLib\{2DF8D04C-5BFA-101B-BDE5-00AA0044DE52}
  5. Check if the value of the underlying folders match the version of Office that is currently being used. Consult the table above.
  6. Delete the folders to versions of Outlook that are not installed. Consult the table above.

    Do not delete the entry for the version of Office that you have installed.

The remains of the old installation of Office have been successfully removed. Continue to the next section.

Outlook registry clean-up

The following explains how to modify the registry. If you modify the registry incorrectly you can end up with serious problems. Back up your registry before you continue. You can restore the registry if a problem occurs after modifying it.
The table below lists the version numbers corresponding to commercial names of Microsoft Outlook editions. You will need to reference this table for some of the procedures detailed in this section.
Outlook version Data
Outlook 2013 9.5
Outlook 2016 9.6
Outlook 2019 9.7

Use the Windows Registry Editor to clean up the remains of old installations.

  1. On your keyboard, simultaneously press the Windows logo and R keys.
    A Run screen opens.
  2. Type regedit in the search box.
  3. Click OK.
    Windows Registry Editor is started.
  4. Navigate to the following location:
    HKEY_CLASSES_ROOT\Interface\{00063001-0000-0000-C000-000000000046}\TypeLib
    Or, if you are using a 64-bit system, to HKEY_CLASSES_ROOT\WOW6432Node\Interface\{00063001-0000-0000-C000-000000000046}\TypeLib
  5. Search for the Version entry here (type REG_SZ).
  6. Check if the value matches the version of Outlook that is currently being used. Consult the table above.
  7. Navigate to the following location in the register:
    HKEY_CLASSES_ROOT\TypeLib\ {00062FFF-0000-0000-C000-000000000046}
  8. Delete the paths to versions of Outlook that are not installed. Consult the table above.

    Do not delete the entry for the version of Outlook that you have installed.

The remains of the old installation of Outlook have been successfully removed. Restart Outlook and verify if this solution worked.

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