repairing corrupted PST files
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Reasons for Outlook PST File Corruption


Are you tired of encountering errors while using Outlook? One common issue that users face is PST file corruption. This can lead to a loss of important emails, contacts, and other data stored in your mailbox. But don’t worry, there are ways to prevent and repair this problem. In this blog post, we’ll discuss the reasons behind Outlook PST file corruption and provide tips on how to avoid it. We’ll also introduce you to the best tool for repairing corrupted PST files – Stellar Repair for Outlook! Read on to learn more about protecting your valuable information from potential damage.

What is a PST File?

A PST file, or Personal Storage Table, is a data file used by Microsoft Outlook to store emails, contacts, calendar items, and other types of data. It allows users to access their mailbox offline and keep a backup of their emails locally on their computer.

The PST file format was first introduced with the release of MS Outlook 97. Since then it has become an essential element for users who rely heavily on the software as it provides them with an easy way to manage large amounts of email data.

PST files can be created in different versions depending on the version of Microsoft Outlook used by the user. The size limit for PST files varies according to its version too. For instance, older versions such as Outlook 2002 have a maximum size limit of 2 GB while newer versions like Outlook 2016 allow up to 50GB.

It’s worth noting that over time these PST files can become corrupted due to various reasons including hardware failures and software bugs. This can cause serious issues for users looking to retrieve important emails from their archive folders which is why regular backups are necessary along with using reliable repair tools like Stellar Repair for Outlook when needed.

Reasons for File Corruption

Outlook PST file corruption can be a nightmare for anyone depending on this email client. It is important to understand why these files become corrupt in order to avoid it from happening again.

One common cause of PST file corruption is due to oversized files. When the PST file exceeds its size limit, it may start malfunctioning and eventually lead to data loss or damage.

Another reason that leads to Outlook PST file corruption is hardware issues such as bad sectors on the hard drive or sudden power outages while Outlook is running. Such incidents can interrupt the normal functioning of Outlook and cause data loss.

Furthermore, virus attacks are another menace that causes severe harm if not dealt with promptly. These malicious programs enter your system through spam emails or infected attachments and corrupt your files including those within Outlook.

Improper closing of applications or an abrupt shutdown of the system could also result in damaged or inaccessible PST files.

How to Avoid File Corruption?

To avoid Outlook PST file corruption, it is important to be proactive in taking measures that can prevent such issues from occurring. One of the most effective ways to prevent file corruption is by regularly backing up your data. This ensures that you have a copy of your important files that can be easily restored in case any problem arises.

Another way to avoid file corruption is by using reliable antivirus software and keeping it updated at all times. Viruses and malware can cause serious damage to your files, so preventing them from entering your system is critical.

It’s also essential to manage the size of your PST files properly. When these files become too large, they tend to slow down or crash, which increases the likelihood of data loss or corruption. A good practice would be breaking them into smaller manageable units.

Closing Outlook correctly and regularly restarting your computer are additional ways you can protect yourself against PST file corruption issues.

How to Repair Corrupted PST Files?

Corrupted PST files can cause a lot of inconvenience for Outlook users. Fortunately, there are ways to repair them and get back your important data. Here is how you can do it:

1. Use the built-in repair tool: Microsoft provides an in-built Inbox Repair Tool (scanpst.exe) that scans and repairs corrupt PST files automatically.

2. Use a third-party PST repair tool: If the built-in tool fails to fix the issue, you can use a reliable third-party software like Stellar Repair for Outlook that efficiently repairs severely damaged or inaccessible PST files.

3. Restore from backup: If you have backed up your Outlook data regularly, you can simply restore the most recent backup file to recover your lost data.

4. Seek professional help: In case none of these methods work, it’s best to seek help from professional technicians who have expertise in repairing corrupted PST files.

Repairing corrupted PST files is essential not only for retrieving critical information but also for maintaining smooth functioning of Outlook application overall. By following these solutions, one can easily handle this problem with ease!


Outlook PST file corruption can be a major issue for users who rely on the application for their daily communication needs. However, by understanding the common causes of PST file corruption and taking steps to avoid them, users can minimize the risk of data loss and downtime.

Moreover, in case your PST files do get corrupted despite precautions; using a reliable PST repair tool like Stellar Repair for Outlook is highly recommended. This software not only repairs corrupt or damaged PST files but also recovers inaccessible mailbox items like emails, contacts, calendars, tasks etc.

By following these tips and utilizing the right tools when necessary, users can keep their Outlook application running smoothly and safeguard their valuable data from unexpected losses due to PST file corruption.

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