How To Resolve Outlook Error 0x80040600 in 5 Minutes

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  • Published on
    August 11th, 2017
  • Updated on
    March 8, 2021
  • Read Time
    6 minutes
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Microsoft Outlook is not a new name. I guess.

Everyone have heard of it.

Being an email client from Microsoft, it has created a genre of users. People of all stages use it for various purposes. With the type of features that it provides to its users, it has  been named as one of the most popular email clients in recent times.

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But even with Outlook there  are some issues which are yet waiting to be resolved. Behind the complex Outlook algorithms and coding, there are bugs which still haunt many users. Many of Outlook users face errors frequently, which are hard to understand and resolve. And one of them is Outlook error 0x80040600.

And today we will be discussing the same.

  • What is Outlook error 0x80040600?
  • Reason for Outlook 0x80040600 error
  • And how to resolve “An unknown error has occurred 0x80040600”

So let’s start:

What is Outlook Error 0x80040600 And Why This Error Occurs?

Before going through all  other details keep one thing in mind and that is

  • Outlook error 0x80040600
  • An unknown error has occurred 0x80040600
  • Or Outlook 0x80040600 error

All the these three errors are same. So you may face or see any of the three errors. So don’t get confused.

For suppose you are trying to send, receive, or read  or even trying to delete an email. And on doing so Microsoft Outlook shows you an error message ” An unknown error has occurred 0x80040600″.

So what is the reason for this error?

The Major Reason For Outlook 0x80040600 Error Is PST File Corruption

Outlook 0x80040600 error

Yes, you heard it right.

Your Microsoft Outlook PST files have either been corrupted or damaged. Which leads to this error as your Outlook is unable to read your PST files.

If something like this happens the immediate result would be that a user would not be able to use email messages, calendars, sent items, drafts, Outbox files, contacts, tasks, journals and other Outlook files.

With this kind of after effect, it becomes crucial to resolve this error as soon as possible.

So How To Resolve: “An Unknown Error Has Occurred 0x80040600”

It might seem hard to fix this error. But it is not so.

I will be telling you a couple of techniques which would help you out in resolving this ‘Outlook error 0x80040600’ without any glitch.

In this case as your Outlook PST files have been corrupted, so the method to fix this error involves fixing and repairing your PST files. So now let’s see how to repair PST files:

Method 1: Repairing Outlook PST With Inbox Repair Tool

Inbox repair tool or ScanPST.exe is a free tool from Microsoft for its users, which helps to repair PST files. To do that first you have to locate your PST files. To locate it you may follow the below mentioned process:

Step 01: Locating PST Files

  • Launch Microsoft Outlook
  • Go to “Tools”
  • Click on “Account Settings”
  • Now click on “Data Files” Tab
  • Now copy or jot down the location of your PST files
An unknown error has occurred 0x80040600

Step 02: Executing Inbox Repair Tool / SCANPST.exe

  • First close down your MS Outlook
  • Open SCANPST.exe
  • Now enter the location of your PST files in Enter the name of the file you want to scan” box
  • And click “Start”

As soon as the repairing process will get over, you will be able to use your Outlook without any errors.

Now the biggest question is where this SCANPST.exe or Inbox repair tool located?

I do know, most of us have no idea where this tool is located in our system. And it is very much necessary to locate it if we want to resolve Outlook error 0x80040600.

In Outlook 2007

  • Windows (64-bit version): C:\Program Files (x86)\Microsoft Office\Office12\
  • Windows (32-bit version): C:\Program Files\Microsoft Office\Office12\

 In Outlook 2010

  • Outlook (64-bit): C:\Program Files\Microsoft Office\Office14\
  • Windows (64-bit version): C:\Program Files (x86)\Microsoft Office\Office14\
  • Windows (32-bit version): C:\Program Files\Microsoft Office\Office14\

In Outlook 2013

  • Outlook (64-bit): C:\Program Files\Microsoft Office\Office15\
  • Windows (64-bit version): C:\Program Files (x86)\Microsoft Office\Office15\
  • Windows (32-bit version): C:\Program Files\Microsoft Office\Office15\

 In Outlook 2016/Office 365

  • Click-to-Run: C:\Program Files\Microsoft Office\root\office16
  • Windows (64-bit version): C:\Program Files (x86)\Microsoft Office\Office16
  • Windows (32-bit version): C:\Program Files\Microsoft Office\Office16

Advantages Of Using SCANPST.exe

  • This technique is very easy to implement
  • It’s free

Disadvantages Of Using SCANPST.exe

  • Consume a lot of time of your PST file is large
  • Requires a little bit of technical know how
  • The success ratio is not that high. Sometimes it works and sometimes not.

Note: If you are looking for a more detailed step  by step procedure, you may also check out my last article: How To Repair PST File With ScanPST

Method 2: Creating Unicode

If the above method that is ScanPST.exe doesn’t work as per plan. Then you can use this technique.

  • For this, first, you have to create a new Microsoft Outlook PST file with a new Unicode format
  • Now set this file as your default file
  • And then import your old PST file data


  • Easy to implement
  • Free of cost


  • consumes time if PST file is large in size
  • Need some technical know-how to execute the above-mentioned steps

How To Fix Outlook 0x80040600 Error If The Above Methods Doesn’t Work

If the above manual procedures doesn’t work then I would suggest you to go for this PST Repair Tool.

Being a Outlook expert and a tool tester, I have used this software and tested it too on various factors. And it really surpassed my expectations. This tool not help users to fix Outlook error 0x80040600 but it also helps in repairing and recovering corrupt PST file and all Outlook Mail items like: Email, contacts, calendar and so  on. Plus this PST repair tool is also known to repair corrupt PST files of more that 80GB size and option to save recovered files in various other formats like PST, DBX, MBOX, MSG and even in EML too.

With its complex and high en algorithm, I find it very effective in resolving this kind of issues.

So do give it a look for once.

Note: If you are looking for a review of this tool, you may check out this article: Best Professional Data Recovery Software

Author’s Verdict

Being an expert, I would always suggest you to go for manual procedures as these techniques are free. But somehow, if these techniques doesn’t work then only I would suggest anyone to go for a tool. These tools are effective but have a price tag too.

So hope now you know how to fix Outlook error 0x80040600 / An unknown error has occurred 0x80040600

If you have any queries or suggestion…do mention it in the comment section

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