How To Repair a PST file? Corrupt, Damaged, or Not Working

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In this article, you will discover a free and automated method to easily repair corrupt PST (Personal Storage Table) files in Microsoft Outlook. If you are seeking the safest solution to fix PST file issues, then consider using Remo Repair PST. This user-friendly tool is compatible with all versions of Outlook, including the latest 2021 release.

Written by
Published on
July 17, 2020
Updated on
October 19, 2023

A PST file, or Personal Storage Table, is a crucial component of Outlook that stores various Outlook items such as emails, events, contacts, calendars, notes, reminders, and more. PST files allow you to work offline and synchronize changes with the Mail Exchange Server once an internet connection is restored.

However, PST files can become corrupt for various reasons, leading to errors like "PST is not a personal folder file" or "The PST file is corrupted and needs repair." This can result in Outlook being unable to open specific folders or send/receive emails.

How to Fix Outlook PST File?

There are two methods to repair PST files, depending on the severity of corruption. The first method involves using the built-in Outlook Inbox Repair tool, known as ScanPST.exe, for minor corruption issues (limited to 2GB). The second method utilizes a reliable PST Repair tool, such as Remo Repair PST, for larger files and severe corruption.

Method 1: Repair the PST File for Free

If your PST file is corrupt or inaccessible, start by using the SCANPST tool:

Step 1: Locate and Repair Using ScanPST

  1. Locate the ScanPST tool on your Windows computer (Location of the Scan PST tool depends on your Outlook version).
  • Outlook 2021: C:\Program Files\Microsoft Office\root\Office16\
  • Outlook 2019: C:\Program Files\Microsoft Office\root\Office16\
  • Outlook 2016: C:\Program Files (x86)\Microsoft Office\root\Office16
  • Outlook 2013: C:\Program Files (x86)\Microsoft Office\Office15
  • Outlook 2010: C:\Program Files (x86)\Microsoft Office\Office14
  • Outlook 2007: C:\Program Files (x86)\Microsoft Office\Office12
  1. Open SCANPST.EXE by double-clicking it.
  1. Click the Browse button to select the corrupt Outlook PST file.
  1. Click Start to initiate the scanning process.
  1. If corruption is found, select "Make a backup of scanned file before repairing" for safety.
  1. Click Repair to start fixing the PST file.

Note: ScanPST may need to be run multiple times and cannot repair severely corrupted PST files. In such cases, consider using the Remo Repair PST tool.

Step 2: Recover Additional Outlook Items

After using ScanPST to repair minor PST file corruption, you can access missing or deleted items by following these steps:

  1. In the Folder List, locate the "Recovered Personal Folders" folder created after repairing the PST file. It contains default folders like Calendar, Contacts, Deleted Items, Inbox, Journal, Notes, Outbox, Sent Items, and Tasks.
  1. If these recovered folders are empty, look for the "Lost and Found" folder, which contains the recovered items. However, the recovered items may not be as organized as they were originally. To address this, you can create a new Outlook PST file:

Step 3:  Create a New PST File

Follow the below steps to create a new PST file:

  • Open Outlook and go to File > Info.
  • Click on Account Settings and then Account Settings again.
  • Select Data Files and click the Add tab.
  • Enter your preferred PST file name in the File Name field.
  • Click OK to create a new PST file.

Note: Creating a new PST file allows you to import recovered items from the Lost and Found folder to your desired location. Simply drag the recovered Outlook items from Lost and Found or Recovered Personal Folders to your specified location and delete the Lost and Found/Recovered Personal Folders.

Bonus Tip: Recover Using .bak Files

A .bak file is a backup created by SCANPST during the PST file repair process. To recover additional Outlook items that cannot be restored by ScanPST alone, follow these steps:

  1. Go to the PST file location and locate the .bak file.
  2. Make a copy of the .bak file.
  3. Rename the .bak file extension to .pst (e.g., rename outlook.bak to Outlook.pst).
  4. Import the .pst file into Outlook using the Import/Export wizard.

Note: In some cases, even this method of recovering Outlook items might not work effectively if the severity of PST file corruption is beyond repair.

Method 2: Repair PST File using Remo PST Repair Tool

If your Outlook PST file is severely corrupt, consider using a professional tool like Remo Repair Outlook PST. This tool can efficiently repair severely corrupted PST files while being user-friendly.

Remo Repair PST is a read-only software, ensuring no data loss during the repair process. It is compatible with all Outlook versions, including Outlook 2021, 2019, 2016, and previous versions. The tool can also recover missing Outlook items, including emails, attachments, contacts, folder structure, and rules.

Steps to Repair PST File using Remo Repair Outlook PST Tool:

  • Download, install, and launch the Remo Repair PST software.
  • Choose the PST file import method based on your needs:
    • A. Open Default PST File
    • B. Select PST File Manually
    • C. Find All Your PST Files
  • After selecting the import method, click Next.
  • Import your PST file for repair, either by specifying the location or using the Browse option.
  • Click the Smart Scan option and select a destination to save the repaired PST file.
  • After the repair process is completed, check the destination location for your repaired PST file.

Watch the video tutorial to repair PST file when ScanPST fails:

Remo PST Repair vs. ScanPST

FeatureRemo PST RepairScanPST
Repair CapabilityExcellent repair capabilities, effective for all levels of PST file corruption.Basic repair for minor issues, may not handle severe corruption well.
Backup CreationOffers the option to create backups before repairs, providing data safety.Does not create automatic backups, necessitates manual backup.
File Format CompatibilityCompatible with various Outlook versions and PST file formats.Compatible with PST files used in Microsoft Outlook.
Data Loss RiskMinimizes data loss during repair, but some risk exists with severe corruption.Also carries a risk of data loss, especially with complex issues.
User-FriendlinessUser-friendly interface with clear instructions and options.Fairly user-friendly but lacks some advanced features.
Advanced Recovery OptionsOffers advanced recovery options, suitable for complex PST file issues.Lacks advanced recovery features and options.
Handling Severely Corrupt PST FilesEffective in handling severely corrupt PST files, minimizing data loss.Struggles with severely corrupt files, may not fully recover data.
Technical Knowledge RequirementRequires basic technical knowledge but provides guidance for users.May be challenging for non-technical users to locate and use.
CostOffers competitive pricing for its features and capabilities.Free tool included with Microsoft Office, no additional cost.
Customer SupportProvides reliable customer support and assistance when needed.Limited official support, but community forums and resources available.
Overall Rating (Out of 5 Star)★★★★★
An excellent choice for comprehensive PST file repair.
Suitable for basic repairs but may fall short for complex issues.


Repairing corrupt PST files is essential to regain access to your Outlook data. While the ScanPST tool can handle minor issues, severe corruption requires a professional tool like Remo Repair PST. By following the methods outlined in this article, you can restore your Outlook data and continue using the application without interruption.

Frequently Asked Questions

1. Why should you not fix corrupt Outlook PST file using the ScanPST tool?

1. Repairing a corrupt PST file manually takes time due to its lengthy process. And in some cases, you need to run the inbox repair tool multiple times to fix the PST file errors.
2. ScanPST only fixes issues related to the internal data structures of a .pst file. And it cannot fix the severely corrupted or damaged PST file.
3. If ScanPST finds any corruption in the block of a structure during the scanning process, then it removes it. Due to this, you might lose some important emails, events, or notes that were a part of the corrupt or unreadable block of structure.
4. ScanPST tool cannot recover the folder structure of the PST file.

2. Why Remo Repair PST tool the best choice to Repair Corrupt PST file?

1. Remo Repair PST file can easily repair your corrupt Outlook data file (.pst) of any size with any level of corruption.
2. The tool can safely recover deleted Outlook emails, contacts, attachments, calendars, events, notes, etc. including the folder structure and rules.
3. It is compatible with all the versions of Outlook such as Outlook 2021, 2019, 2016, 2013, and its previous versions.
4. It can also fix password-protected and encrypted PST files. And allows you to preview the repaired PST file for free.

3. How to Avoid PST file corruption?

1. Take a regular backup of your PST file. This avoids the risk of PST file corruption or error. Check out this Remo Outlook Backup and Migrate tool, if you are interested to learn how to backup Outlook using a tool.
2. Do not shut down your Windows computer while working on the Microsoft Outlook 2019, 2016, or any version.
3. Do not save the PST file on a faulty network drive or server.
4. Do not let the PST file size exceed its limit.
5. Turn off Microsoft Outlook properly.
6. Avoid using irrelevant Outlook add-ins.
7. Avoid sudden interruptions while working on the PST file.

4. How to import repaired PST file in Outlook?

Once you have repaired your corrupt .pst file, follow the steps to import the repaired PST file into your Outlook.
a) Open Outlook application.
b) Click on the File tab.
c) Now, click on Open & Export and then select the Import/Export option.
d) Under Import and Export Wizard, choose Import from another program or file option and click Next.
e) Now, select Outlook Data File (.pst) as the file type to import from and click Next.
f) Click on the Browse button and locate the repaired PST file that you want to import and click Next.
g) Finally, set the options for importing items and click on the Finish button.

5. How to Repair PST file using ScanPST tool?

To Repair PST file using ScanPST tool, follow the below steps;
Step 1: Open the ScanPST tool on your Windows PC. 
Step 2: Click on the Browse button and select the corrupt PST file you want to repair for free.
Step 3: Once you have located the PST file, click the Start button. Now, the ScanPST tool will start scanning for the PST file corruption. To create a safe copy of your corrupted PST file, you can choose the Make a backup of scanned file before repairing option. 
Step 4: If the tool finds any corruption, click on the Repair option. This way you can fix your PST file using the ScanPST file for free.

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