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Outlook Error Code 0x80040600

Users of Microsoft Outlook who have Windows XP, Vista or Windows 7 as their operating system might receive an error stating “0x80040600: An unknown error has occurred.” when they click Send/Receive or when they try to view emails in the Microsoft Outlook inbox. This is related to the error “An unknown error has occurred. 0x80040600” since the causes and methods of properly attending the main problems are similar. An error with the same cause as these two will show up when the user is trying to delete an email from the inbox, saying “Messaging interface caused an unknown error.” All these errors are caused by a corrupt PST file. A PST file (filename extension - *.pst) is a ‘personal storage table’ file used by Microsoft Outlook to store the user’s personal data such as emails, contacts and schedules due to the fact that there are separate personal folders in Outlook for the user’s mail history, contacts, etc.

In some cases the below fix may not work. In most it will so give it a shot first. If the below method does not work or you need a simpler one then we recommend downloading a copy of Stellar Outlook PST Repair Here

To solve this problem, the first thing you need to do is to set the option to show hidden files. This can be done in Windows XP by following the steps outlined below:

  1. Start Windows Explorer.
  2. On the Tools menu, click Folder Options.
  3. Click the View tab.
  4. Under Hidden files and folders, click Show hidden files and folders, and then click the OK button.

To show hidden files and folders in Windows Vista and 7, do the following:

  1. Go to the Control Panel.
  2. Click Appearance and Personalization.
  3. Click Folder Options.
  4. Click the View tab.
  5. Under Advanced Settings, click Show hidden files and folders, and then click OK.

The next step is to make use of the Inbox Repair tool provided by Microsoft Outlook to repair your inbox and restore your corrupt PST file. But first you need to find your Outlook PST file. For this, complete the following steps:
In Windows XP:

  1. Click Start, and then click Run.
  2. Type control in the Open box, and then press ENTER.
  3. If you see the Pick a category view, click User Accounts
  4. Double-click Mail.
  5. Click Data Files.
  6. Click Personal Folders, and then click Settings.
  7. Note the text in the Filename box.
  8. Click OK, and then click Close two times.

In Windows Vista and Windows 7:

  1. Go to the Control Panel.
  2. If you see Control Panel Home view, click User Accounts and Family Safety
  3. Click Mail.
  4. Click Data Files.
  5. Click Personal Folders, and then click Settings.
  6. Note the text in the Filename box. 
  7. Click OK, and then click Close two times.

The text in the filename box will be the path to your PST file. This will be needed later, when using the Inbox Repair Tool.
Now we will focus on how to use the Inbox Repair Tool. This differs according to your version of Microsoft Outlook. For Microsoft Outlook 2003, take the following steps:
In Windows Vista/7 using Microsoft Outlook 2003:

  • Click Start, type %ProgramFiles%\Common Files\System\MSMAPI\1033\ in the Start Search box, and then press ENTER.
  • Find and then double-click SCANPST.EXE to start the Inbox Repair Tool.
  • In the Enter the name of the file you want to scan box, type the path and file name of the Outlook .pst file that you found in step 2.
  • Click Start.
  • After the Inbox Repair Tool operation is complete, click OK.

In Windows Vista/7 using Microsoft Outlook 2007:

  • Click Start, type %ProgramFiles%\Microsoft Office\Office12\ in the Start Search box, and then press ENTER.
  • Find and then double-click SCANPST.EXE to start the Inbox Repair Tool.
  • In the Enter the name of the file you want to scan box, type the path and file name of the Outlook .pst file that you found in step 2.
  • Click Start.
  • After the Inbox Repair Tool operation is complete, click OK.

In Windows XP:

  • Click Start, and then click Search.
  • Click All Files and Folders.
  • In the All or part of the file name box, type Scanpst.exe.
  • Change the selection in the Look in box to the local hard disk. For example, change the selection to Local Disk (C:).
  • Click Search.
  • When the search is complete, double-click SCANPST.EXE to start the Inbox Repair Tool.
  • In the Enter the name of the file you want to scan box, type the path and file name of the Outlook .pst file that you found in step 2.
  • Click Start.
  • After the Inbox Repair Tool operation is complete, click OK.
At this point the error should be fixed, and you should be able to Send/Receive from your email client, as well as read emails without any further problem.

For more great tips check out our Outlook PST Repair articles. As well you may be interested in learning how to backup Outlook PST file.