Outlook email will not boot and open

Lenny Mancuso 0 Reputation points
2026-09-09T20:40:11.0266667+00:00

When I click on the icon, the envelope icon just opens and closes without opening the application.

Outlook | Windows | New Outlook for Windows | For business
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  1. AI answer

    2026-09-09T20:40:24.73+00:00

    For New Outlook for Windows, use these steps:

    1. Open Task Manager and end any Microsoft Outlook processes that are still running.
    2. Open the Microsoft Store, search for Outlook for Windows, and launch Outlook directly from its Store page instead of the existing shortcut.
    3. If Outlook still does not open, try the mailbox in Outlook on the web as a temporary workaround.
    4. If Outlook briefly appears and then closes, open Event Viewer > Windows Logs > Application, try opening Outlook again, and check the newest relevant event entry.

    If the issue is with the New Outlook app itself, repair or reset it:

    1. Go to Start > Settings > Apps > Installed apps.
    2. Find New Outlook.
    3. Select Advanced options > Repair.
    4. Restart the PC and test Outlook.
    5. If it still fails, use Reset.

    If repair and reset do not help, uninstall New Outlook, restart the PC, and install it again.

    Do not use Safe Mode, /resetnavpane, COM add-ins, creating a new Outlook profile, or SCANPST for this scenario, because those apply to Classic Outlook, not New Outlook for Windows.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Ivory 1,155 Reputation points Independent Advisor
    2026-09-09T21:05:31.89+00:00

    Hi Lenny,

    First, you can follow the guidance in this article: Outlook for Windows not responding, hangs, freezes, or stops working | Microsoft Support.

    If the issue persists, please try the following steps:

    1/ Reinstall/Repair Edge WebView2

    Visit Microsoft’s official WebView2 download page. Scroll down to the Evergreen Standalone Installer and download the appropriate version. After downloading, right-click the installer and select Run as administrator. Follow the on-screen prompts. If WebView2 is already installed, it will repair it; if missing, it will install a fresh copy.

    2/ Repair or reset New Outlook

    Repair Outlook New Windows

    Press Win + I to open Settings. Go to Apps > Installed apps. Type ‘outlook’ in the search bar on top. Outlook will appear in the search results. Click the three dots next to the app, then select Advanced options.

    Scroll down to the Reset section. Click Repair first. This will attempt to fix the app without deleting any data.

    If repairing doesn’t fix the issue, click Reset. You’ll see a prompt warning that app data will be deleted. Click Reset again to confirm. Then, restart your PC and try launching the New Outlook app again.

    Note: Resetting will remove your configured accounts, app settings, and locally cached data, such as .OST files. However, your emails stored on the server will remain safe. Any manually added .PST files won’t be deleted but may need to be re-added after the reset.

    Additionally, you can run a more thorough repair option. Open the Settings app and navigate to Apps > Installed apps. Locate Microsoft 365 in the list (it may also appear as Office). Click the three-dot menu next to it and select Modify. A prompt will appear asking how you want to repair Office. First, choose Quick Repair. If that doesn’t resolve the issue, return to the same menu and select Online Repair. Follow the on-screen instructions to complete the process. Once done, restart your PC and try launching the New Outlook app again.

    For reference: Repair an Office application | Microsoft Support

    I hope this provides enough clarity and helps you stay inform with your current situation.

    Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.  

    If the answer is helpful, please click 'Yes' and kindly upvote it.

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