How to Fix Outlook Unknown Error Code 0x80070003

Summary: Nowadays, Outlook is the most preferred choice for every user. But sometimes, it displays an unknown error code 0x80070003 that creates a hindrance while opening the Outlook application. In this post, we will explain the step-by-step process to fix the error using the PST Data Recovery.

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As we all know, Outlook is a widely used email client all over the globe. Apart from being an email client, it is also used for various functionalities like calendar, contact manager, journal, etc. It also acts as a Microsoft Sharepoint and exchange server. So, it is prone to many malware and software intrusions. However, there are several other issues due to which users face this error arises. In this blog, we will solve different queries that help in eliminating the Outlook error. But before continuing further, let’s be aware of some of the reasons behind the error.

Reasons Behind the Error Code 0x80070003

Unfortunately, Outlook has stopped and there could be multiple reasons behind the 0x80070003 error code showing up in Outlook. Some of them are mentioned below. Read those carefully.

  • Outlook stops functioning due to virus/malware attacks.
  • In case the Outlook profile is not properly configured.
  • Due to bad installation of Outlook in the local machine.
  • When the Outlook is not in proper use as it has to be.

These are the reasons due to which an unknown error has occurred in Outlook. Now, let’s discuss how to resolve this error code without any issue.

How to Fix Error Code 0x80070003?

Sometimes, users are not aware of the proper solutions, so they try complicated solutions that result in data loss. In the below section we will show you how to fix this error.

Method 1: Using REGEDIT

In this method, firstly the user needs to delete the Outlook profile. It will only delete the settings. Now, follow the below-listed steps, to complete the process and resolve the windows 10 update error 0x80070003.

  • Close the Outlook application and Open the Registry editor by pressing Windows + R key.
  • Now, Enter Regedit and press the Ok button.
  • After that, go to HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\.
  • Then, delete all the files from the locations and folders like \PST, \Search\, \Search\Catalog.
  • Here rename the folder name in your profile. C:\User\” username”\Appdata\Local\Microsoft\Outlook
  • Finally, add all the Outlook settings to your profile and Restart the Outlook application.

After completing all the steps precisely, Outlook’s unknown error issue will be resolved.

Method 2: Using Shell Folders in REGEDIT

This method uses the Windows Registry Editor to fix the windows 10 mail error code 0x80070003. Using the below method it can be open in different versions of Windows.

In Windows 7: Type regedit.exe in the search bar, and press the Enter button.

In Windows 8: In the Run command, enter regedit.exe, and hit the Ok button.

Now, the below-listed steps will help you to fix the Outlook error code 0x80070003.

  • After opening the registry editor, search and enter the subkey below. HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders.
  • Look for the Personal in the value.
  • Now, you have to check if the data field consists of a valid location.
  • Then, Copy & Paste the location in Windows Explorer.
  • After that, verify if you can find the location.
  • In the files, double-click on Personal value.
  • Copy and paste the location of My Document Folder and tap the Ok button in the Value Data Box.
  • Here you can view %USERPROFILE%\Documents in the Value data box.
  • Al last, you can exit the Registry Editor.

If the above method doesn’t work, then there is some issue in your PST file. In that case, you have to fix it using professional software. In the below part, we have mentioned the PST repair software.

Professional Method

Aryson Outlook PST Repair is a standalone utility that recovers and repairs data of corrupt PST files. These PST files consist of data such as emails, contacts, calendars stored within them. Since all the data files are prone to corruption, so does Outlook. This software is capable of not just repairing the corrupted files but also recovering the deleted emails. Also, users can save the recovered data into multiple output formats.

How to Recover Damaged or Corrupt PST File?

To recover corrupt or damaged PST files, perform the steps listed below.

  • Download and Run PST Data Recovery.
  • Now, click on the Browse button to add the PST file you want to recover.
  • Then, choose the PST file and tap on the Open button.
  • Select the Scanning mode from the recovery settings drop-down and press the Ok button.
  • After that, you can Preview the emails displayed from the tree structure.
  • Click on the Save button from the menu bar to save the recovered emails.
  • Select the Saving format to save your resultant files.
  • Tick the additional features as per your choice and press the Ok button.
  • Finally, the recovering process is complete.

Key Features of PST Data Recovery Tool

  • The software restores all the mail items such as emails, calendars, contacts, etc., from the corrupt Outlook PST file.
  • It supports the recovery of encrypted and password-protected PST files.
  • This utility saves the recovered PST file to PST, MBOX, DBX, EML, and MSG.
  • Users can Preview their PST files in a free recovery tool.


Thus, Outlook is a widely used email client, but sometimes it shows an unknown error code 0x80070003 while working. In the above write-up, we have described the manual and professional approach that fixed Outlook Error 0x80070003. Sometimes, the error shows up due to corrupt or damaged PST files. In that case, we recommend users opt for the professional tool. The software repair and recover the corrupt and damaged PST files data effortlessly.

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