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Outlook PST File Not Opening? Causes and Practical Solutions

Xanthe Clay — Fri, 16 Oct 2026 13:29:20 +0000

Seeing errors like Outlook PST file not opening when sending or receiving emails can be very distressing. This error might often seem very common but can cost you a lot if it contains years of accumulated emails and contacts. Sometimes, a simple uninstallation and reinstallation or a network fix resolves the issue. But when these solutions fail to help, you need reliable workarounds to handle your PST file efficiently.
Let’s see what the major reasons are for a PST file not opening in Outlook issue and how you can troubleshoot it to fix the Outlook PST file and access your mailbox data with minimum downtime.

Why am I unable to open PST file in Outlook?

Let’s scroll down to find major reasons restricting access to the Outlook PST file:

Your PST file is damaged

When your PST file is damaged or corrupted due to sudden power crashes, abrupt shutdown, improper Outlook exits, or hard drive errors, you can have issues in opening the PST file.

PST is open in other application

When your PST file is already being accessed in another application or Outlook, you may face different problems. Sometimes when you exit Outlook, the process continues to run in the background.

Your PST is stored on network or external drive

A PST file might start showing errors and issues in opening in Outlook if it is stored on a network drive, removable media, or external drive.

You have an oversized PST

When there is an oversized PST file, the Outlook application starts malfunctioning and freezing, making it difficult to access the mailboxes.

PST can't be located by Outlook

If a PST file stored on your PC was deleted, or renamed, relocated, or moved from its original location, you might not be able to find and open it anymore.

Faulty add-ins creating problems

If you’ve enabled add-ins within Outlook that are faulty or interrupting the mailbox functioning, Outlook might not be able to open the PST file.

Issue with the security software

Sometimes the security software or antivirus or anti-malware programs installed on the system restricts the access of PST file and mailboxes within Outlook.

Solutions to resolve the error “PST file not opening in Outlook”

Follow the solutions provided below to fix the Outlook PST file not opening in Outlook issue:

Solution 1: Check the file location

The first and foremost solution to avoid the issue should be verifying the saved location of the PST file. Check that the file is stored at its correct path and you’ve the necessary permissions to access it. Follow the steps given below:

Open Outlook and then go to File > Account Settings > Account Settings.
Click on Data Files and copy the file path if the required file is stored in that location.
Now right-click on the PST file, select Properties, and check that the file isn’t set to be Read-only.

Solution 2: Try opening Outlook in Safe Mode

Another solution that might help you open your PST file is accessing Outlook in Safe Mode.

Use the Windows and R keys together to open the Run window.
Type outlook.exe /safe and hit the Enter button.
When Outlook opens in safe mode now, click on File, then Options, and select Add-ins.
Now try disabling the add-ins one-by-one to detect the faulty ones. Finally, you can remove or disable the add-ins that are causing the issue.

Solution 3: Manage the PST file size

Since your PST file is too large, you can face complications in opening the PST file. Here is how to archive old emails and compress the file size.

In Outlook, go to File, then Tools, and click on Mailbox Cleanup.
Click on AutoArchive to archive old items or delete unnecessary data.
Now click File > Account Settings > Account Settings > Data Files.
Select your PST file and then click Settings and Compact Now to compress the file size.

Solution 4: Run ScanPST.exe utility

Microsoft Outlook comes with a built-in utility that helps in repairing PST file corruption and make the mailbox items accessible. Here is how to use it:

Go to the location where SCANPST.exe is stored: -For Outlook 2016/ 2019/ 2021/ O365: C:\Program Files\Microsoft Office\root\Office16 -Outlook 2013: C:\Program Files(x86)\Microsoft Office\Office15 -Outlook 2010: C:\Program Files (x86)\Microsoft Office\Office14
Launch the utility and click Browse to open your PST file.
Click Start to scan the files and click Repair if errors are found.
Once done, launch Outlook again to see if the issue is resolved.

Conclusion

The overall essence of the article explains that the error in the PST file can be due to damage or corruption in the PST file. To resolve the error, you can use the methods as explained above. However, the issue might get serious if you’re unable to open the file even after using these solutions. Therefore, use an Outlook PST Repair tool to repair PST file while retaining all data, metadata, email attributes, and the original folder structure.

5 Signs That Your PST File is Corrupted

Xanthe Clay — Thu, 01 Oct 2026 07:28:37 +0000

What if you’re all set to offboard an employee, but the moment you try to access the PST file containing their information, you find out that you can’t open it? Corruption in an Outlook PST file can cause Outlook to crash repeatedly, show data file errors like missing folders or emails, or failure to open certain files or folders. In this guide, we’ll talk about 5 signs that’ll help you identify if your PST file is corrupted or if it’s an Outlook specific problem.

Top 5 signs suggesting your PST file might be corrupted

Sign 1: Outlook PST file cannot be opened

This is one of the most common signs that might indicate corruption in the PST files. If your Outlook is unable to open a PST file that was easily accessible earlier, then you must check for any structural damage in the data file. If the file structure is damaged, Outlook might be unable to load important files or folders.

Sign 2: Specific folders are inaccessible in PST file

If Outlook is unable to access some folders in the PST file, check if the data file is experiencing any errors. In some cases, instead of the whole file becoming unusable, only some folders become inaccessible. Structural damage can often affect some folders within the file instead of affecting the whole file. Here’s how you can identify it easily:

• You can open the Sent Items folder, but the deleted items folder won’t open.
• A particular folder shows an error when you try to open it.
• Outlook crashes when you try to open a certain folder in PST file.
• Individual files or message can’t be opened in Outlook.

Sign 3: Outlook crashes or freezes

If Outlook freezes mid-function again and again, when working with a specific PST file, it can indicate that there’s some kind of corruption or error in the data file. Particularly, if Outlook:

• Freezes when trying to open a specific folder.
• Stops responding when trying to open a specific PST file.
• Hangs or pauses a lot when trying to open/load a PST file.
• Freezes when you’re moving or copying an email or a file to a different location within Outlook.
• Crashes when trying to edit a specific email or a certain group of messages.

Sign 4: Outlook shows error messages when trying to open PST files

If Outlook is unable to read PST file data due to severe structural damage, it might show the following error messages:

• The file [path][name].pst is not an Outlook data file.
• An unknown error has occurred: 0x80040600.
• Errors have been detected in the file [path][name].pst.
• Outlook cannot open the data file or folder.

Sign 5: Can’t move or copy items/folders in PST file

A PST file can open in Outlook and still face problems if there’s structural damage or corruption. Outlook may have problems while trying to delete messages, copy items, modify data, or move files and folders, from one location to another within the email client. If this operation works normally in other PST files but creates issues in a single PST file, then it’s worth checking that data file for any corruption. You just have to verify if this issue is consistent in a single PST file or in multiple PST files.

How to confirm that a PST file is corrupt?

Noticing these signs can give you an idea of the structural damage or corruption present in your PST file, however you should confirm whether the file is actually corrupt or not. Check if you face these problems with only one PST file or does it affect multiple files in Outlook. If you face the same problem with multiple data files at once, then the problem might be Outlook specific. However, if the issues are consistent with one PST file only, then it can be possible that the PST file is corrupted.

One easy way to check for errors in PST files is with the help of the Inbox Repair Tool (ScanPST.exe). This free tool scans the PST files and lists down all the minor errors present in the PST file. You can locate the ScanPST.exe tool on your system depending on the current version of your Outlook and Windows OS. If the corruption level is too severe, take the help of a dedicated Outlook PST repair software to recover your PST file data.

Final Insights

A corrupted PST file shows its signs, even though it may not always feel obvious. Error messages on opening, Outlook crashing, or missing items can indicate there’s something wrong with your data file. Check all the signs to confirm if your PST file is actually corrupt or if it’s an Outlook specific issue. To confirm this, check for corruption with ScanPST.exe.