Microsoft Live Mail Error code 0x800CCC91 in Windows 10/8/7

Description of Outlook Error code 0x800CCC91:

This article describes the Outlook Error code 0x800CCC91.It is Microsoft Outlook Error. This Error restricts your ability to send/receive emails on your Outlook email address successfully. This error is quite common and is faced many Microsoft Outlook users.

Disclaimers: Fixing an error on Outlook deals with your emails and attachments. Please backup your emails and it’s folders before you proceed. If you are not sure about the procedure, contact the technician for the support.

Error code 0x800ccc91

Windows Outlook error code 0x800ccc91

Causes of Outlook Error code 0x800CCC91:

  • Incorrect Outlook Configuration setting
  • PST files get corrupt
  • PST file crosses its fixed file size limit
  • Failure of POP3 and Protocol STMP in database server connection
  • Improper synchronization between Outlook and the server
  • Usage of invalid password or username
  • Virus Infection

Symptoms of Outlook Error code 0x800CCC91:

  • “Error 0x800CCC91” appears and crashes the active program window.
  • Your PC frequently crashes with Error 0x800CCC91when running the same program.
  • “Microsoft Outlook Error 0x800CCC91” is displayed.
  • Windows runs sluggishly and responds slowly to mouse or keyboard input.
  • Your computer periodically “freezes” for a few seconds at a time.

The solution applies to the following versions of Microsoft Outlook:

Outlook 2007Outlook 2010
Outlook 2013Outlook 365
Outlook 2016Microsoft Office (2013/365/2016)

How to Fix the Troubleshoot Outlook Error code  0x800CCC91:

To fix the troubleshoot Outlook error 0x800CCC91is following three methods and explain them briefly.

Method 1: Fix System Integrity Issues

  • open Run Window and enter the Outlook/safe then click Ok then start Outlook in Safe Mode.


  • After that Open the Run Window and enter the cmd then click OK.


  • When the Command Prompt window opens, type SFC /scan now command and hit Enter.

sfc scanSFC scan

  • Now the system should run a scan for any system integrity issues. In case it finds any, it will get everything fixed automatically.

if this method did not help to remove 0x800CCC91Error Code on Microsoft Outlook, then you should try the following methods.

Method 2: Use a system Repair Tool

In this method to check what is the core of the problem, we would highly recommend running a scan with a PC optimization tool, such as Regcure Pro

Method 3: Fix Windows Essentials

Microsoft indicates Windows Essentials 2012 damage as one of the 0x800CCC91error causes. so try this,

  • Right Click on Start button and enter the Control Panel then click it.

control panel

  • Navigate to the Programs and Features and find Windows Essentials 2012 on the list.
Remove the old version office

Remove the old version office

  • Right-click on it and select Uninstall/Change.
Repair the office

Repair the office

  • When a confirmation window shows up, option for Repair all Windows Essential Programs and wait until a confirmation window reporting about successful repair emerges.
Repair the Windows

Repair the Windows

  • Now close everything and try to login to your Microsoft Outlook account.

If the above methods to resolve the Outlook error 0x800CCC91fails, then instead of wasting your time, it is better to switch to a third party utility like Outlook Repair Tool which helps to fix the error codes without affecting the original data.

If you would like to have a support taken through a technical assistance, feel free to initiate a chat or write us on with the complete information of the computer make and model, office or windows operating system versions and the best time to reach you for support.
We provide support for Microsoft products like Windows and Office and Outlook, we can also set up free tools provided and included with Microsoft Windows and can train you on how to use them to maintain the health of your computer.You can also ask for System Repair Image support or some Recovery help, we also restore your computer to a point when it was working fine without any issues.
Feel free to chat with us for any support. A free assistance can be provided for all the basic troubleshooting without any additional resources.
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