Repair Crashed Outlook

A Complete Guide to Repair Corrupt Outlook PST & OST File

Nowadays, Microsoft Outlook has become one of the most significant email client for an organization users. It is mainly used as an email application that can synchronize user’s entire emails from the Web to Desktop. It contains multiple components such as Calendar, Contact Manager, Notes etc. Moreover, it can also save the required data in PST as well as OST file format. Let us understand the basic information about PST & OST file, possible reasons behind the corruption along with most effective ways to fix corruption.

Microsoft Outlook Personal Storage Table (.pst) File

PST or personal storage table is a proprietary file format. It is used to manage users personal information in Microsoft Outlook. Also, it is known as Outlook data files, which contains all components i.e. email messages, contacts, calendar, and other necessary items in a PST type. It is the most reliable format, which helps to store the data in ANSI and Unicode format.

It's MIME type is application/ Moreover, its default location varies based on Windows Operating System and MS Office versions.

For Outlook 2007- C:\Users\%username%\AppData\Local\Microsoft\Outlook\

For Outlook 2010- C:\Users\%username%\Documents\Outlook

Reason Behind PST File Corruption

There are so many reasons due to which .pst data file become corrupted or damaged as well. Go through the following points:

  • Corruption has caused in Outlook due to hardware or software problems.
  • Many viruses or other malicious attacks due to which Outlook data files become inaccessible.
  • Abnormally terminating the Microsoft Outlook.
  • Some bugs in MS Outlook is also responsible for PST file corruption.

Types of Outlook PST File Error Message

There are following possible errors in Outlook PST as discussed below:

  • The file xxxx.pst is not a personal folders file.
  • Microsoft Outlook has encountered a problem and have to close it. We are sorry for the inconvenience.
  • The file xxxx.pst could not be found.
  • Unable to display the folder. The file xxxx.pst could not be accessed.
  • xxxx.pst can not be accessed – 0x80040116.
  • File xxxx.pst could not be accessed. Data error. Cyclic redundancy check.
  • Cannot expand the folder. The set of folders cannot be opened. The file xxxx.pst cannot be opened.
  • Cannot move data items. The item could not be moved. It was either already moved or deleted, or access was denied.
  • Cannot move all items. Could not Move the item. The original was either moved or deleted, or access was denied.

Know How to Repair Microsoft Outlook PST File

Microsoft Outlook developer provides an inbuilt solution, which is known as Inbox Repair Tool or scanpst.exe. With this tool, users can easily recover the corrupted or damaged Outlook data file (.pst). It first scan the PST file and then, repair it. One need to perform the following steps to fix MS Outlook PST file as discussed below:

  • First, you have to close the Microsoft Outlook.
  • Then, click on the Local Drive, go to the Program Files and select the Microsoft Office. Next, click on the SCANPST option.


  • The pop-up Window will display, now, click the Browse button for selecting the Outlook PST file which you want to repair and choose the Start button.


  • After selecting the Start option, the software will start to check the consistency of the specific file.


  • A new screen will appear, it will display location of .pst file, total number of folders and data items found in a PST file. Make sure that Make backup of scanned file before repairing option will be checked. After this, choose the Repair option to restore the corrupt or damaged PST files.


  • After clicking on Repair option, the scanpst.exe tool will start showing Repair complete message. Press OK button.


Points to Remember

  • Before executing SCANPST operation, make a backup copy of PST File.
  • The above steps are also applicable for Microsoft Outlook 2010.

What to do if SCANPST is not Found?

If users are unable to find the SCANPST utility on the default location, then they might disable Show hidden files and folder option. Be sure that this option is enabled.

For Windows 10, you have to check the following points:

  • Click on the Ask me anything option and enter the Folder Options and hit on the File Explorer options.
  • Then, a new screen will be opened as File Explorer Options. From the Advance Settings, click on the View tab. After that, enable this Show hidden files, folders, and drives option and Press OK button.

There are many circumstances in which scanpst.exe fails to repair PST file errors which makes this application less efficient and reliable. In simple terms, the success of scanpst.exe tool is totally based on the corruption available in PST file. If above-stated solution cannot work fine, then, one can take help of the trusted third party software.

In order to eliminate all type of data corruption from PST, one can use the third party utility i.e. Outlook PST repair tool. It is a reliable and advance tool that can recover/repair all data items such as emails, calendars, journal, notes, etc., in PST format. With this software, users can remove both minor as well as major level of corruption from Outlook data file. The software is programmed in such a manner that it can retrieve a PST file even without installing the MS Outlook on a local machine.

Download Outlook PST Repair Tool

Go through the following steps:

  • Once the MS Outlook PST file repair tool is downloaded, click on Add File to start PST file recovery process.


  • Now, Choose the Browse (...) button to provide the destination location of .pst file and then, choose the Advance Scan option to recover the highly corrupted .pst files.


  • The software will show the repaired PST file in the proper folder structure. Next, choose the subsequent folder to view its content.

Choose the email to preview its message along with their respective attachments.


  • After that, you can easily export single or multiple mailboxes in the recovered PST file by clicking on Export button.


  • Now, getting these three Export option i.e. PST, EML or MSG in which the particular data will be saved. Here, choose the folders, which contains the exported data from Folder(s).
  1. Check & customize Mail Filter Option to specify the specific date range from where the software will export the recovered item.
  2. In case, if you will get a large sized .pst file then, check mark the PST split option for splitting a PST file by size.


  • After completion, the software will display the success message, and click on OK button to complete the entire Outlook PST file repair process.


MS Outlook Offline Storage Table (.ost) File

OST or Offline Data File is created by MS Outlook when connected with the Exchange Server to access the data in offline mode. For this way, users can easily edit, compose or delete their specific emails in an offline mode. It can synchronize automatically whenever a connection has been established again. Moreover, its default location is mentioned below.

For Windows 8: Drive:\Users\user\AppData\Local\Microsoft\Outlook

For Windows 7: Windows Vista: Drive:\Users\user\AppData\Local\Microsoft\Outlook

For Windows XP: Drive:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook

Reasons For Outlook OST File Corruption

There are numerous of reasons due to which .ost data file gets corrupted. Thus, go through the below points:

  • Corruption caused in Outlook because of power failure, faulty networking device, and some bad factors.
  • Due to any disaster, which makes the final OST file incomplete.
  • Outlook profile becomes corrupted or damaged too.
  • Microsoft Outlook mailbox size is too large.

Types of Outlook OST File Error Message

Go through the different types of .ost errors as given below:

  • Cannot open your default email folders. The file xxxx.ost is not an offline folder file.
  • Unable to expand the folder. The set of folders could not be opened. Errors could have been detected in the file xxxx.ost. Quit all mail-enabled applications, and then use the Inbox Repair Tool.
  • Encountered a large numbers of conflict items.
  • Cannot open particular Outlook items in offline mode.
  • Various error occurs when synchronizing Exchange Server mailbox with OST files.

Methods to Fix MS Outlook OST File

MS Outlook offers an inbuilt utility i.e. scanost.exe, which helps to repair offline storage table (.ost) files. To run the scanost.exe utility, follow some of the following steps:

  • Follow the below path where the scanost.exe tool is available.

C:\Program Files\Microsoft Office\Office12


  • At this desired location, you can get scanost.exe utility or also make the finding more easier by using Windows search box.

Note: As noted that Microsoft Outlook has been connected with Exchange to enable this .exe file. Otherwise, the following an error message will be pop-up on the screen “offline synchronization is not supported for your mailbox”.

  • When you click on the scanost.exe file, it will ask to choose the desired profile. Make sure that you have select MS Outlook profile, which is running with respective Exchange server. After choosing the desired profile click on OK button.
  • These two following option helps to repair Microsoft Outlook OST files respectively:
  1. Scan each folder – From this option, users can deploy the scanning on entire database.
  2. Choose respective folder to scan (choose this option if you have a particular time or connection speed is considered as well)- To select the required folder, which has a suspicion and wants to probe them.


  • Select any of the following option and then, click on Begin Scan option. Remember, do not forget to mark the Repair Errors check box.


  • Now, application will start scanning the OST data files along with synchronizing the data and finish the entire OST repair task at once.


One of the best trusted third party utility is OST file repair tool, which is used to recover the orphaned and corrupted OST files. The software is capable to recover an inaccessible OST file and exports the recovered data in 3 different file formats i.e. PST, EML and MSG. It maintains the Meta properties of all data items intact during the conversion process. The tool has dual scanning modes, Quick for less corrupted .ost files and Advance for highly corrupted .ost data files.

Download Outlook OST Repair Tool

Let us follow the given below steps:

  • First, choose Add File option to select the MS Outlook OST files.


  • Once the OST file is added, OST repair tool will start a quick scanning to fix Outlook OST file. In case, it will not provide the precise results then, you have to enable the advanced scanning option.

Also, Browse the Temp Folder where the software keeps the scanned copy of the OST file.


  • The software will show you the complete preview of .ost file. Now, click on Export button, if you need to export the complete OST data file then click on the Export Button on Menu Bar option.


  • The Export screen will appear, check mark the following options:
  1. Select Folder: Select the desired folder including emails, contact, calendar etc. which is needed to export.
  2. Export As: Select the type of a file to export from the Outlook OST file.
  3. Mail Filter: Apply Mail Filter to export the specified date of the emails.
  4. Split PST Option: If this option is enabled then, software divide the large sized PST files.
  5. Browse Destination: Select the desired location for saving the exported data files.


  • After that, click the Browse and to select the destination location.


  • After finishing the export process, the following screen will show the completion message. Then, press OK button to exit.