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.
- Exit Outlook.
- Press the Windows logo key + R to open the Run dialog box.
- Type
Outlook /safeand 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.
- 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.
- 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.
- 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.