PST (Personal Storage Table) is the mail storage file, which is used by Microsoft Outlook email client. Microsoft Outlook stores emails, calendar entries, contacts, tasks, notes, etc from POP3, IMAP, MS Exchange Server and HTTP accounts in a single Outlook PST file. However, Outlook Express uses DBX (Data Base Extension) files that can store emails in multiple DBX files and personal settings in Registry keys.

Default Location of PST file in different versions of Operating system is as given below:

  • Windows XP:  C:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook
  • Windows Vista & 7:  C:\Users\user\AppData\Local\Microsoft\Outlook

Different versions of Outlook have different PST file size limit i.e,

  • Outlook 2002: It supports PST file up to 2GB
  • Outlook 2003 and Outlook 2007:  Supports PST files up to 20GB
  • Outlook 2010: It supports PST file up to 50GB

Common reasons for PST file corruption are as follows:

  • Due to oversize: Generally, when PST file exceeds or reaches its file size limit then it may get corrupted. Older versions of Outlook supports PST file up to 2GB like Outlook 2000. Hence, there are more chances of PST file corruption in older versions of Outlook. However, latest versions of Outlook supports PST file up to 20GB and more thus there are less chances of PST file corruption. Actually, in earlier versions of Outlook, format of PST file was ANSI code. Whereas, latest versions of Outlook like Outlook 2003/2007 have PST file in UNICODE file format thereby increasing the limit up to 20GB and more.
  • Due to incomplete archiving of PST file:  In order to maintain size of PST file efficiently, you need to archive it regularly. Archive is a collection of items that are not used regularly but are needed. Outlook has AutoArchive feature that automatically clears out email messages, tasks, appointments etc, which are older and stores them in separate Archive folder thereby reducing the PST file size. Archiving of PST file can also be done manually. If due to power surge problems, interruption occurs while archiving the PST file, then PST file may get corrupted resulting in loss of Outlook data.
  • Sharing PST file over network: Generally, PST files do not support shared access. Outlook is supposed to exit the PST file after 30 minutes of inactivity. If you share a PST file over network then due to usage of PST file by other user, scheduled backups cannot access the file because it is still in use. If other user has done some modification to existing PST file then it may get corrupted, which in turn does not allow you to access data from PST file resulting in loss of emails and other Outlook data.
  • Improperly terminatng Outlook: This is the common reason for PST file corrption. If you abruptly close Outlook while the PST file is being accessed by Outlook then PST file may get corrupted resulting in loss of emails.

Requirements: MS Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2003 and Windows 2008 Outlook Versions: Outlook 2000, 2002, 2003, 2007 and 2010


Even though, PST files get corrupted due to above mentioned reasons, you can easily repair Inbox folder of Outlook using reliable PST repair tool. 

In order to avoid PST file corruption due to oversize, organise emails in a proper manner and regularly delete unwanted emails from Outlook. Always, exit Outlook properly to avoid PST file corruption. Outlook Repair software is a reliable Outlook PST repair tool that repairs corrupted PST files.  Outlook has inbox repair tool to repair corrupted PST files but, it does not work when PST file gets corrupted severely. In such cases, this software can be used to repair severely corrupted Outlook PST files. This software can also repair Outlook PST files, which are highly compressed and protected with passwords.This software can repair Outlook 2010 PST, 2007, 2003 and 2000 PST file and recover data from these files. This software can also fix Outlook PST errors in an easy way.

Follow these steps to repair Outlook PST file that has been corrupted:

Step 1: Download and install Outlook Repair software then launch it to repair Outlook PST. The main screen appears with three options as shown in Figure 1. From the main screen select appropriate option to open or find the PST file or to select the PST file based on Outlook profile. From the next Window select the appropriate PST file and click "Next" to repair Outlook PST

Repair Outlook PST - Main Window

Figure 1 : Main Window with Options

Requirements: MS Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2003 and Windows 2008 Outlook Versions: Outlook 2000, 2002, 2003, 2007 and 2010


Step 2: The next screen appears with two options i.e. "Normal Scan" and "Smart Scan" as shown in Figure 2. Based on the severity of PST file corruption, select one of the two options and click "Repair".

Repair Outlook PST - Destination Path Selection

Figure 2 : Select Scan Option and Destination Path

Step 3: After repair process is finished, view recovered data to evaluate the recovery results as shown in Figure 3.

Repair Outlook PST - Recovered Data Window

Figure 3 : Summary Screen

Requirements: MS Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2003 and Windows 2008 Outlook Versions: Outlook 2000, 2002, 2003, 2007 and 2010

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