1. Run the Inbox Repair Tool (ScanPST.exe)
Outlook comes with a built-in tool to repair corrupted PST files:
- Navigate to your Outlook installation directory (usually C:\Program Files\Microsoft Office\root\OfficeXX).
- Run ScanPST.exe.
- Browse to the PST file location (typically under Documents\Outlook Files).
- Let the tool scan and repair the file.
2. Create a New PST File
If the damage is too severe:
- Backup the corrupted PST file.
- Open Outlook → File → Account Settings → Data Files → Add → Create New PST.
- Set it as the default data file.
- Import emails from the backup file if possible.
3. Compact Your PST File
To reduce the chance of future corruption:
- Go to File → Account Settings → Data Files.
- Choose your PST → Settings → Compact Now.
4. Update or Repair Office
Ensure you're using the latest version of Outlook:
- Open Outlook → File → Office Account → Update Options → Update Now.
- Or go to Control Panel → Programs → Microsoft Office → Change → Repair.
5. Check Your Drive for Errors
- Use Windows Disk Check:
- Open Command Prompt as Administrator.
- Run chkdsk /f /r.
- Restart the system and let the scan complete.