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[[:start|Home]] > [[:faq|FAQ]] > [[faq:email|Email]] > [[faq:email#email_clients_mobile|Email Clients & Mobile]] > [[faq:email#mail_client_issues_and_troubleshooting|Mail Client Issues and Troubleshooting]] > **Why an Outlook PST file can become corrupted**

====== Why an Outlook PST file can become corrupted ======

Outlook PST files can become corrupted due to various factors, including:

==== 1. Oversized PST Files ====
PST files have size limitations, and if they exceed these limits, they can become corrupt. The maximum size for a PST file varies depending on the Outlook version, but it's generally recommended to keep them below 10 to 15 GB to avoid issues.


==== 2. Sudden System Shutdowns ====
If Outlook or your computer crashes while a PST file is in use, it can lead to corruption. Hence, it is essential to exit Outlook properly and avoid sudden power outages.


==== 3. Hard Drive Issues ====
Bad sectors or hardware problems on the storage device where the PST file is stored can cause corruption. Regularly check and maintain your storage device to prevent issues.


==== 4. Software Bugs ====
Occasionally, Outlook may have software bugs or issues that can result in PST file corruption. Keeping your Outlook software up to date with the latest updates and patches can help mitigate this risk.


==== 5. Conflicting Antivirus or Security Software ====
Some antivirus or security software may conflict with Outlook and inadvertently cause PST file corruption. Ensure your antivirus software is up to date and configured to work smoothly with Outlook.


==== 6. Virus or Malware Infections ====
Viruses or malware on your computer can infect and corrupt PST files. Regularly scan your system for malware to prevent this.


To minimize the risk of PST file corruption, it's essential to regularly back up your Outlook data, maintain your system and software, and follow best practices for PST file management. Additionally, Microsoft offers a built-in tool called the [[https://support.microsoft.com/en-us/office/repair-outlook-data-files-pst-and-ost-25663bc3-11ec-4412-86c4-60458afc5253|"Inbox Repair Tool" (scanpst.exe)]] to repair minor PST file issues. If the corruption is severe, you may need to use third-party PST repair tools or services to recover your data.
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