This guide shows you the methods to prevent Microsoft Outlook from crashing on startup. 

Workaround: Restart your computer

Before you move on to the other methods, make sure to restart your computer. Performing a simple system reset will boot the system with functioning applications without the need of making changes to the software. 

1. Repair the Microsoft 365 application

Windows 10 and onwards come with a built-in feature that allows the system to perform a repair process on the selected program and applications. When Microsoft Outlook crashes, you must repair it through the built-in feature to prevent such activities from occurring. Below is how you can repair the Microsoft 365 application:

2. Create a new Outlook profile

A corrupted Outlook profile will also prevent the application from starting properly. Therefore, in this case, you must create new profiles to fix this problem. You can create a new Outlook profile by following the instructions as under:

3. Rollback an Outlook update

When Outlook crashes, it means that the current version is corrupted. Therefore, you must wait till Microsoft releases a new update for the software. In the meantime, you can roll back an update and use the previous version of Outlook. Below are the instructions for rolling back an Outlook Update:

4. Update Your Windows 

Outlook requires an up-to-date system. Therefore, an outdated Windows will also cause this issue to occur. you must make sure that your Windows is up-to-date before running the program to prevent such errors from occurring. Windows can be updated with the instructions listed below:

5. Download Microsoft Support and Recovery Assistant

The Microsoft Support and Recovery Assistant is a tool that helps you run tests on the Microsoft application at fault and provides solutions to fix them. Therefore, using this tool will help you find the solutions to fix your Outlook. Below are the instructions for using the Microsoft Support and Recovery Assistant:

6. Start outlook in safe mode and disable add-ins

Add-ins provide additional commands and features to the Microsoft 365 applications. However, these same add-ins are known to cause issues with the startup of Outlook. Therefore, you must start Outlook in safe mode and disable each add-in one by one till you find the culprit that was causing the issue. Following are the instructions for disabling Outlook add-ins in safe mode:

7. Reinstall Microsoft 365

If the issue still persists, then, as a last resort, you must completely reinstall the Microsoft 365 program. Although reinstalling the program will not cause data to lose, you must still have a backup copy of your information saved. Below is how to uninstall Microsoft 365:

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