How to Fix Microsoft Outlook Not Opening Issue?

MS Outlook is one of the most popular email client service providers. It enables users to manage their contacts, calendars, emails, and tasks effectively. But sometimes, while utilizing Outlook, users face an issue stating that “Microsoft Outlook Not Opening.” Well, don’t worry! In this blog, we will discuss the reasons and the complete solution to fix the issue. 

Why is Microsoft Outlook Not Opening?

There can be several reasons behind the MS Outlook not opening issue. Some of them are mentioned:
  • Using an outdated version of Outlook.
  • Many Outlook running in the background. 
  • Due to Outlook PST files being deleted or damaged accidentally.
  • Improper configuration of the application.
  • Inappropriate installation of the application.
  • Virus malware infection.
  • Internal registry conflict.

How to Fix Microsoft Outlook Not Opening Issue?


Solution 1: Update Outlook and Windows

One of the reasons your MS Outlook won’t open is that your Outlook program and Windows OS are outdated. You have to update Outlook or install the latest Windows OS updates to resolve the issue.

To Update Outlook:

  1. Go to File>>Office Account.
  2. Click on the Updates option and then choose Update Now.

To Update Windows OS:

To install the latest update for updating Windows manually (if the Automatic update option is not configured), these are the steps:
  1. Go to Settings.
  2. Choose the Update and Recovery option and click on “How updates get installed.”
  3. Turn on the Automatic updates.
Now, try to access the Outlook application and check if the Microsoft Outlook not opening” issue is resolved. If not, then proceed to the next method.
Note: Outlook will not open in some scenarios when there’s a compatibility problem between Outlook and the antivirus program. According to Microsoft, upgrading the antivirus program can help fix the error.

Solution 2: Launch Outlook in Safe Mode

Launching Outlook in safe mode begins with only a basic setup without add-ins. It will help you check if a damaged or faulty add-ins is causing the error.

Steps to launch Outlook in safe mode:

  1. Go to Start>>Run or Press Windows + keys together to access the Run Dialog box.
  2. Now, type “Outlook.exe/safe” in the box and click OK or tap the Enter button.
Note: Ensure to keep space while typing ‘Outlook.exe’ and ‘safe’
If Outlook starts in safe mode, then a faulty or damaged ass-ins is responsible for the issue. If Outlook doesn’t open in safe mode, proceed to the following method.
To disable the faulty add-ins, here are the steps;
  1. Open the Outlook menu and go to File>>Options.
  2. In the Outlook Options wizard, click on Add-ins from the left side and then choose COM Add-ins in the Manage field. Click GO
  3. Now, unselect all the add-ins checkboxes, and click on OK.
  4. Restart Outlook in normal mode.
If this works, one-by-one enable the add-ins and keep rebooting the Outlook after enabling each add-in. Doing so will help you determine the faulty add-in(s) causing the issue. 


We derive the best solution to fix the Microsoft Outlook not opening issue with this blog. These solutions are easy to follow, even non-tech users also use them, and there is no data loss during the process. We hope this blog helps you.


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