Microsoft Outlook terminate automatically while opening

 When Microsoft Outlook automatically terminates (closes) while opening, the issue is often caused by problematic add-ins, a corrupted user profile, or a damaged Office installation. 

Here are the primary troubleshooting steps recommended by Microsoft, ordered from simplest to most involved:

1. Run Outlook in Safe Mode and Disable Add-ins 

Starting Outlook in safe mode prevents add-ins from loading and helps determine if an add-in is the cause of the problem. 

• Exit Outlook.
• Press the Windows logo key + R to open the Run dialog box.
• Type Outlook /safe and press Enter.
• If Outlook opens successfully in safe mode, the issue is likely caused by a faulty add-in. To disable them:
  • Go to File > Options > Add-ins.
  • At the bottom of the window, next to Manage, select COM Add-ins and click Go.
  • Clear all the checkboxes in the list, and then select OK.
  • Restart Outlook normally. If the problem is resolved, re-enable the add-ins one by one to identify the specific one causing the conflict. 

2. Repair Microsoft Office

Corrupted Office program files can also cause crashes. An online repair is more thorough than a quick repair. 

• Exit all Office programs.
• Open the Control Panel.
• Select Programs > Programs and Features (or Apps > Apps & features in Windows 10/11).
• In the list of installed programs, right-click your Microsoft 365 or Microsoft Office installation and then select Change (or Modify).
• Choose Online Repair (select Repair if only given one option) and follow the on-screen prompts.
• Restart your computer after the repair is complete. 

3. Create a New Outlook Profile 

If the existing profile is corrupted, creating a new one can often fix the issue. 

• Exit Outlook.
• Open the Control Panel.
• Search for and open Mail (Microsoft Outlook).
• In the Mail Setup window, select Show Profiles.
• Select the old profile and click Remove. (Note: If you're unsure if data files are backed up, skip removing the old profile and just proceed with adding a new one).
• Click Add, type a name for the new profile, and then follow the prompts to add your email account.
• Set the new profile as the default profile and open Outlook. 

Additional Steps

• Install the latest updates: Ensure both Windows and Outlook are fully updated, as bug fixes for known crashing issues are released regularly. You can update Office from within Outlook by going to File > Office Account > Update Options > Update Now.
• Run the Microsoft Support and Recovery Assistant (SaRA) tool: This diagnostic tool can automatically find and fix common Outlook issues.
• Check for Antivirus Conflicts: Antivirus software with Outlook integration can sometimes cause problems. Temporarily disable it to see if the issue stops.