What's the PST File?

Written by:   |   Last Updated: November 26, 2018

Microsoft Silver

PST File Summary

Five known software programs (notably, Microsoft Outlook Express developed by Microsoft Corporation) are related to the PST file extension. In addition, they are categorized under two distinct file types, but mainly identified as the Outlook Personal Information Store File format. These files can be categorized as Data Files.

File Extension PST files have been identified on both desktop and mobile devices. They are fully or partially supported by Windows, Mac, and iOS. The main PST file type has a Popularity Rating of "Low", meaning these files are not frequently present on your typical desktop or mobile device.

If you are having problems opening PST files, or would simply like to learn more about the software programs and developers that are associated with them, please see the complete information contained below.

Low
Universality
8477
File Rank

/ 11690

Active

Mode

26

November

2018

Revised

Open PST Files with FileViewPro

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Kinds of PST Files

  2 known file types use this extension

Leading PST Type

.PST
File Format:.pst
Group:Outlook Personal Information Store File

A PST file is a data storage file used by Microsoft Outlook, an email client and personal information manager. It contains e-mail folders, addresses, contacts, and other data.

Company: Microsoft Corporation
Class:Data Files
Subkey: HKEY_CLASSES_ROOT\.pst

Software Programs That Open The Outlook Personal Information Store File:


Microsoft Outlook Express by Microsoft Corporation

Windows
Mac

Microsoft Exchange Server by Microsoft Corporation

Windows

Microsoft Outlook 2016 by Microsoft Corporation

Windows
Windows Phone
iOS
Android
OS X El Capitan

OEMailRecovery.com Outlook Recovery Toolbox by Microsoft Corporation

Windows

More PST Files

.PST
File Format:.pst
Group:STAR-CD V3 Results Data

Data file associated with STAR-CD, an engineering application used for the analysis of in-cylinder flow and combustion. PST file contains results data generated by the software.

Company: Siemens AG
Class:Data Files

Software Programs That Open STAR-CD V3 Results Data Files:


STAR-CD by Siemens AG

Compatible with:

Windows

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PST File Popularity


Top PC Operating Systems

Windows (97.14%)
Macintosh (2.06%)
Linux (0.73%)
Chrome (0.05%)
Other (0.01%)


PST Troubleshooting


Typical PST Opening Challenges

Microsoft Outlook Express Not Present

You attempt to load your PST file and get an error such as "%%os%% Can't Open The PST File Extension". When this happens, it is commonly due to Microsoft Outlook Express missing in %%os%%. The typical path of opening your PST with a double-click won't work because %%os%% cannot make the program connection.


Tip: If you know of another program that can open your PST file, you can try opening it by selecting the application from the programs listed.


Outdated Microsoft Outlook Express

Sometimes your installed version of Microsoft Outlook Express won't support your Outlook Personal Information Store File file. If you've got the wrong version of Microsoft Outlook Express installed, you'll need to install the correct version. Most of the time your Outlook Personal Information Store File file was created by a newer Microsoft Outlook Express than what you have installed.


Tip: If you right-click on your PST file, then select "Properties" (Windows) or "Get Info" (Mac), you can obtain hints about what version you need.


Regardless, most of the PST file opening problems relate to not having the right version of Microsoft Outlook Express installed.


More Causes of Problems Opening PSTs

Although you might already have Microsoft Outlook Express or another PST-associated software installed on your computer, you can still encounter problems opening Outlook Personal Information Store File files. If you are still having problems opening PST files, there may be other issues that are preventing you from opening these files. Problems unrelated to software:

  • File references in the Windows Registry for PST are wrong
  • Corruption of the PST file description inside the Registry
  • Corrupt install of Microsoft Outlook Express or other PST-related program
  • File corruption affecting your PST file
  • The PST is infected with a virus
  • Device drivers of the hardware associated with your PST file are corrupt or out-of-date
  • Insufficient system resources to successfully open Outlook Personal Information Store File files

Quiz: Which of the following is not a MIME type?









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