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Opened Jan 19, 2026 by Bea Gardiner@bea66c27226832
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I cant start Microsoft Outlook or receive the error Cannot start Microsoft Outlook Cannot open the Outlook Window

After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, Outlook repair support team but we recommend moving to Windows 11.

Hence, you must now consider fixing your PST file after the Outlook crash. Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems. These often help resolve issues without the need to contact support. In this article let’s have a look at the solutions to fix Outlook crashes during startup problems. We have covered some simple and effective solutions to resolve this problem of Outlook opening and closing, read on. I am asking for help for my sister's computer as she doesn't have a lot of funds to take it to a tech to have it repaired.

Repeat the process for all the add-ins that were selected earlier and wait until the Outlook crashing problem repeats. Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove. For more information, see Introduction to Outlook Data Files (.pst and .ost). The steps to access the repair tool vary depending on your operating system.

Starting Outlook in safe mode, which starts Outlook without add-ins loaded, can tell you if an add-in is the source of the problem. Turn off all the add-ins, close Outlook, and reopen it (not in Safe Mode). If it opens correctly, you can enable the add-ins one by one. After turning on each one, close and reopen Outlook to see if it loads correctly. It will help pinpoint the troublesome add-in you can remove or replace.

Outlook stores all your email messages, meetings and events, contacts, and tasks in data files. These files occasionally might become corrupted. You can run the Inbox Repair Tool (scanpst.exe) to scan your Outlook data files and repair errors. Over the last couple of weeks it will not open normally (not even in safe mode) and I am having to do the windows repair option in settings. I have also tried the Classic Outlook Profile Set Up Troubleshooter.

If the network is performing slowly, Outlook must wait for read and write operations to the AppData directory to finish. We recommend that you move several items in your larger folders to separate folders, or that you archive those items by using the AutoArchive feature. Make sure that the latest updates for Outlook are installed. For more information, see How Outlook repair support team to install the latest applicable updates for Microsoft Outlook (US English only). For more information, see Support for Office 2016 and 2019 clients connecting to Microsoft 365 services has ended. Running the /resetnavpane command removes all customizations to the navigation pane.

Things changed on February 1st, 2024 when Google and Yahoo started applying new email sender standards in an attempt to improve their users’ experience. Even with the correct SMTP details, the server might be down or malfunctioning. Understanding the specific error codes returned by the SMTP server can help diagnose the issue. Mistyped usernames or passwords can prevent successful authentication with your SMTP server, leading to failed email sends. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app.

For a list of antivirus software vendors, see Consumer antivirus software Outlook repair support team providers for Windows. If the problem doesn't occur after you restart Outlook, one of the add-ins is likely the cause of the problem. Restore the add-ins one at a time until the problem does occur to determine which add-in is causing the problem. Although add-ins can enhance your user experience, they can occasionally interfere or conflict with Outlook. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

In System Configuration, if you select a check box, the related service or startup program runs when you restart the computer. If the check box is cleared, the service or startup program doesn't run when you restart the computer. When you start Windows normally, several applications and services start automatically and then run Outlook repair support team in the background. A Selective Startup or "clean boot" process can help you identify problems that are caused by application conflicts. To keep up with new viruses as they're created, antivirus software vendors periodically provide updates that you can download from the Internet.

Follow the steps below on how to create a new profile for Outlook. When Outlook is started in safe mode, all settings are reverted to Outlook default settings which allow for easier detection and rectification of errors. Once you observe that Outlook is not updating automatically, follow the instructions below to restore Outlook repair support team the Auto-update feature. Click on Programs and Features and then click on uninstall programs. In the drop-down list, uncheck any faulty or needless add-ins that you wish to disable, and then click "OK" and re-launch Outlook for the changes to fully take effect. "COM Add-ins" are modules that add specific features to Microsoft Office products including Outlook.

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Reference: bea66c27226832/calvin2001#7