Repair Office Files » Fix Error – Outlook File Cannot be Previewed as No Previewer Installed

Fix Error – Outlook File Cannot be Previewed as No Previewer Installed

PST RepairIn this article, we discuss an Outlook error that reads ‘Outlook file cannot be previewed as no previewer is installed’. If you are someone facing this error, this article will help you understand why it occurs and solutions to resolve the same.

‘Outlook file cannot be previewed’ error is known to occur normally when you open an attachment in an Outlook email. For instance, it is common when you open an Excel workbook that is attached to an Outlook email.

The main reason for this error is due to incorrect registry settings related to the Excel previewer. Now, before we move onto the solutions to solve this error, first we check if you have an MSI or Click-to-Run installation of Outlook (explained below in Step 1).

Step 1: Check if you have an MSI installation or Click-to-Run

  1. Open Outlook and click on File
  2. Choose Office Account
  3. Here, in the product information section, if you see ‘Office Updates’, you have a Click-to-Run
  4. If you don’t see ‘Office Updates’ in the product information section, you have an MSI based installation.

Once you have identified what kind of installation you have, proceed to the solution below in Step 2.

Note: The solution involves modifying registry values, so be extra cautious before proceeding as even a small error can cause serious problems.

Step 2: Solve ‘Outlook file cannot be previewed as no previewer is installed’

  1. Close Outlook and click on Windows + R to open Run dialogue
  2. Type ‘exe’ and click Ok
  • For Click-To-Run installation



  • For MSI based installation

Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\PreviewHandlers

  1. Once you have located this path, locate the following value

‘00020827-0000-0000-C000-000000000046’ and check it’s Type

  • If the ‘Type’ is REG_SZ, right click on the above value and click Modify. In the Value data box, type Microsoft Excel Previewer and click Ok
  • If the ‘Type’ is something other than REG_SZ, right click on the value, click Delete and then click Yes
  • If there is no value, go to the Edit menu and click on New

Then click String Value, type ‘00020827-0000-0000-C000-000000000046’ and hit Enter

The error ‘Outlook file cannot be previewed as no previewer is installed’ can generally be resolved by modifying registry values. However, there are other errors in Outlook that may cause problems such as frequent freezes or problems with sending/receiving emails etc. In order to resolve such errors, you will need to repair the associated PST file.

Remo Repair Outlook (PST) is a great tool to repair corruption in PST files. The advantage of using this software is that it is a dedicated PST repair tool that can repair all kinds of corruption issues. Secondly, it works on a read only mechanism, so your original PST file is not altered during the repair process.

This software works with all recent versions of Outlook and Windows, so you can use it worrying about compatibility. The trial version of Remo Repair PST is available for free, download and try it out today!

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