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How to Resolve the Error Code, 'Microsoft Outlook Not Responding'?

Outlook is undoubtedly one of the most widely used email client application used by people across the globe. However, Outlook users often encounter errors and are unable to access their data. One of the most common error messages is, 'Microsoft Outlook not responding'. To help you resolve the error, we have discussed several methods to fix the error. Just make certain that you opt for the right method as choosing a wrong option can erase your entire data and you might not be able to access the data.

How to Fix the Error Code, 'Microsoft Outlook Not Responding'?

If a user gets a pop-up message, displayed on the screen, 'Microsoft Outlook not responding', then don't panic as we have listed some useful methods that will enable the user to fix the error in Outlook versions such as 2016, 2015, 2014, 2013, and etc.

Shut Down Outlook and Other Processes

Let us inform you that Outlook users will encounter a problem if an existing program is stuck. This situation arises when 'Outlook.exe' runs in the memory or when the user starts another 'Outlook.exe' program. We suggest you shut down all 'Outlook.exe' programs by using the 'Task Manager' option. Follow the below steps to shut down Outlook and other programs:

  • Click on the 'Task Manager' option.
  • Now, go the 'Processes' option and look for all the processes that include Outlook in their name.
  • Select the processes and click on the 'End Process' option.
  • Restart Outlook.

Remove the Faulty Outlook Add-ins

Add-ins enhances the user's experience, however, faulty add-ins create problems with the functioning of Outlook. Below we have mentioned the steps to spot faulty add-ins:

  • Open Outlook in the 'Safe Mode' and type 'Outlook.exe /safe'.
  • Now, try sending send/receive files.
  • Go to the 'File' option and click on the 'Add'-ins' tab.
  • Select the add-ins one by one and restart Outlook after checking.
  • When Outlook does not launch, then you will find the faulty add-ins.

Shut Down the Antivirus Software

Antivirus software safeguards the system and examines every sending and receiving emails. This creates a problem with the functioning of Outlook and in most cases; the antivirus software blocks some add-ins causing Outlook to crash unexpectedly. To avoid such a situation, we suggest you go to the 'Control Panel' and shut down the antivirus software. Now, restart Outlook and examine if there is still a problem. If you resolve the issue and Outlook starts functioning, then you know the reason behind the error.

Archive Old Emails

To keep using Outlook without an error, we recommend you organize and clean Outlook on a regular basis. It is advisable that the user arrange their emails in separate folders instead of making the common mistake of storing the data in a single folder. Most of the users make a huge mistake of not deleting their old emails. We highly suggest that the users delete their old emails and archive important emails. This way, the user can function Outlook without any hassle and free space.

Decrease Outlook File Size

As you already know that Outlook saves data in the 'Personal Storage Table' (PST) files. However, if the user is using Outlook with MS Exchange mailboxes, then the files are stored in 'Offline Storage Table' (OST) files. When PST and OST files exceed the normal size, then there is a high possibility that the users might end up corrupting and damaging files. It is advisable that the user clean their Outlook Inbox and decreases Outlook file size. The user can opt for the 'Outlook Compact' feature and reduce the file size without any hassle.

Repair Outlook

Another way to resolve the error is by repairing Outlook. Follow the below steps to fix the error:

  • Go to the 'Control Panel' option and locate Microsoft Office.
  • Click on it and choose the 'Change' option.
  • Click on the 'Repair' option.
  • Click on the 'Continue' tab.


If a user encounters the error, "Microsoft Outlook not responding", then opt for KDETools Outlook Management Toolkit. The advanced toolkit enables the user to fix the issue and repair major and minor issues. The user can access their Outlook files without any hassle.

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