Your Outlook may stop opening, show errors, or lose emails due to a corrupted PST file. This data file stores your emails, calendar, and contacts locally. This guide explains how to use the built-in Inbox Repair Tool, SCANPST.EXE, to fix the file and restore your data.
Key Takeaways: Repairing a PST File with SCANPST.EXE
- Close Outlook: You must completely exit Outlook before running the repair tool to avoid data loss.
- Locate SCANPST.EXE: The tool’s location varies by your Office version and Windows bitness, such as in the Office installation folder.
- Create a Backup: The tool will prompt you to make a backup copy of the original PST file before attempting repairs.
What the Inbox Repair Tool Does
SCANPST.EXE is Microsoft’s official utility for diagnosing and repairing errors in Outlook Personal Folders Files, known as PST files. It scans the file structure for corruption, which can happen from sudden Outlook closures, disk errors, or the file reaching its size limit. The tool attempts to rebuild the internal data tables and recover as much information as possible. It is the first and most reliable method to fix common PST corruption issues before considering third-party software.
Steps to Run the Inbox Repair Tool
Follow these steps in order to repair your PST file. Ensure you have enough free disk space, as the process creates backup and repaired files.
- Close Outlook and locate SCANPST.EXE
First, ensure Outlook is not running. Check the system tray for its icon. The repair tool is not in the Start Menu. You must navigate to its installation folder. Common paths include C:\Program Files\Microsoft Office\root\Office16 for Microsoft 365 or C:\Program Files (x86)\Microsoft Office\Office14 for older 32-bit versions. The version number in the path corresponds to your Office release. - Start the tool and select your PST file
Double-click the SCANPST.EXE file to launch it. In the main window, click the Browse button. Navigate to the folder containing your damaged PST file. The default location is usually C:\Users\[YourUsername]\AppData\Local\Microsoft\Outlook. Select the file and click Open. - Begin the scan and review results
Click the Start button to begin the analysis. The tool will examine the file structure. This process can take several minutes for large files. When the scan finishes, a dialog box will show if errors were found. Click the Repair button to begin fixing them. - Backup the original file and complete repair
Before repairing, the tool asks if you want to make a backup of the original file. Always select Yes and choose a safe location. This preserves your original data in case the repair has issues. Click OK to proceed with the repair operation. - Open Outlook with the repaired file
After the repair finishes, close the Inbox Repair Tool. Open Outlook normally. It should now load the repaired PST file. Check your folders for recovered items. A new folder named “Recovered Personal Folders” or “Lost and Found” may appear containing salvaged data.
Common Mistakes and Limitations
Using SCANPST.EXE seems simple, but users often encounter specific problems. Knowing these ahead of time helps avoid data loss.
SCANPST.EXE Cannot Find the PST File
If the Browse dialog does not show your PST file, you may be looking in the wrong folder. Outlook data files are often hidden. In File Explorer, enable the viewing of hidden items from the View tab. Also, ensure you are selecting the correct file type in the Browse dialog by choosing Personal Folders Files from the dropdown menu.
The Tool Fails or Reports It Cannot Repair the File
Severe corruption may be beyond the tool’s ability to fix. First, verify you are using the correct bit version of SCANPST.EXE. If you have 64-bit Windows but 32-bit Office, you must use the 32-bit tool. If it still fails, try running the tool from an administrator command prompt. Right-click the Start button, select Windows Terminal (Admin), navigate to the tool’s folder, and run the command `scanpst.exe -force` on your file.
Outlook Still Has Errors After Repair
If problems persist, the PST file might be too large or damaged. Create a new PST file in Outlook via File > Account Settings > Account Settings > Data Files tab > Add. Move your folders from the old file to the new one. If items are missing, check the backup file created during the repair. You can run SCANPST.EXE on that backup copy as well.
PST File Repair Methods Compared
| Item | Built-In Inbox Repair Tool (SCANPST.EXE) | Third-Party Recovery Software |
|---|---|---|
| Cost | Free with Microsoft Office/Outlook | Usually requires a purchase |
| Best For | Common corruption, minor file errors | Severe corruption, advanced recovery |
| Data Recovery Depth | Repairs file structure, may not recover all items | Often includes deep scan for deleted or overwritten data |
| Ease of Use | Simple interface, few options | More complex interfaces with multiple scan modes |
| Primary Action | Repair the existing PST file in-place | Extract data to a new PST or other formats |
Always run SCANPST.EXE as your first repair step. You can now recover a damaged Outlook data file using the official tool. For ongoing health, regularly archive old items to keep your PST file small. Use the Outlook Data File settings to compact the file periodically, which helps prevent future corruption.