Errors are annoying, especially when you are about to do something meaningful. Today in the article on error solving, we will be fixing a similar error 0x80070021 code. Now, this error code appears in more than one area of your windows operating system. This error majorly occurs in Microsoft Outlook Data files, Furthermore, under host service in ASP.NET. These are the two major areas where users report that this error 0x80070021 Windows occurs. In this error solving guide, we will be going to talk in brief about this error. We will take a look at its major causes. Later we will go through some methods that will surely fix this error 0x80070021 windows problem within a few moments.


Cause Behind Error 0x80070021 Windows Problem:

There are specific causes due to which this error 0x80070021 Windows are showing up. This error is actually a hexadecimal code that contains the address of memory location and detail about the error 0x80070021 windows. This implementation is done to identify the error and why it is showing up. You will see this error only in Windows OS based programs, drivers, and configuration files. Now let’s move on to its possible cause of this error 0x80070021 windows.

  • ASP.NET is either disable or outdated
  • Other programs are using outlook data
  • Services of MS office are conflicting with MS Outlook
  • HTTP is deactivated in .NET Framework
  • Recent Recovery from Malware, Adware or Virus

How to Fix & Solve Error 0x80070021 Windows Code Issue

In this section, we will go through all the troubleshooting methods by which you can overcome this error 0x80070021 windows problem. Kindly follow each step carefully, to avoid any further problems.

1. Activation of HTTP in .NET Framework –

In this method, we will be activating the HTTP connection in .NET framework. This error code 0x80070021 windows 10 occurs in ASP.NET when you try to host WCF Service. Now let’s proceed to the steps involved in removing this error.

  • STEP 1. Click on Start, type Run, and Hit Enter
  • STEP 2. Type appwiz.cpl in the Run box, and hit Enter


  • STEP 3. Click on Turn Windows features on or off on Left Plane
  • STEP 4. Under ‘Windows Features’ expand .NET Framework Advanced Services


  • STEP 5. Now expand WCF Services


  • STEP 6. Tick on HTTP Activation Checkbox

HTTP activation

  • STEP 7.  Click OK and Reboot System

2. Stopping Outlook Process –

As outlook is a system program, it always runs in the background. So when you try to copy outlook data to a different location, this error 0x80070021 windows 8 occurs. So in this method using task manager, we will stop the outlook service.

  • STEP 1. Firstly Close the Outlook window 
  • STEP 2. Open Task Manager by pressing Ctrl+Shift+Esc simultaneously
  • STEP 3. Right Click on Microsoft Outlook


  • STEP 4. Now click on End Task
  • STEP 5. Now you can copy or move outlook files without this outlook 0x80070021 error

3. Uninstalling Microsoft Communicator –

You might not be aware of this program in windows. Recently it has been renamed to MS Lync. This program allows you to conduct live video and conversation. However, users have reported that uninstalling this program has solved the Internal Server Error 0x80070021 windows 7 issue.

  • STEP 1. Click on Start, type Run, and Hit Enter
  • STEP 2. Type appwiz.cpl in the Run box, and hit Enter

run box 0X80070021

  • STEP 3. Under Programs and Features, look for Microsoft Office Communicator

Microsoft Office Communicator uninstall 0X80070021

  • STEP 4. Right Click and Uninstall it
  • STEP 6. Restart your System

4. Removing Search Email Indexer Add-In in Outlook –

Search Email Indexer is an outlook add-in. This add-in makes outlook services run in the background. Sometimes closing it from the task manager won’t solve as this add-in is activated. So we will be removing this add-in to fix this outlook error 0x80070021 windows problem.

  • STEP 1. Open Outlook, Now click on the File menu

addin 1 0X80070021

  • STEP 2. Go to Options and Click on Add-ins

addin 2 0X80070021

  • STEP 3. Select COM Add-ins and Hit Go

addin 3 0X80070021

  • STEP 4. Select Search Email Indexer and Click Remove on Right

addin 4 0X80070021

  • STEP 5. Now Click Ok
  • STEP 6. Reboot System, to make changes effective

With this being the end of the solving guide on Error 0x80070021 windows code. We hope you successfully fix this error 0x80070021 windows. We have given you all the working methods using step by step approach. And as we have already mentioned that this error 0x80070021 windows majorly shows up in outlook while copying outlook files. Apart from this, when you try to activate WFC services in .NET framework.

We hope you like this error 0x80070021 windows solution guide. It will be great if you post your feedback regarding this error 0x80070021 windows in the comments. We post every day and everything related to technology and games like articles on tech news, gaming, guides, reviews, tips, and other exciting stuff. So Do follow us. Thank You!

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