Computer

Regarding your question, I recommend that you clean boot Windows and then start Outlook to see if it makes a difference. A "clean boot" begins Windows with a limited collection of drivers and starting applications, allowing you to see if a background program is interfering with your application. For further information, see How to Perform a Clean Boot in Windows - Microsoft Support.

If the query persists, please establish a new Windows user profile. Create a local user or administrator account in Windows - Microsoft Support, and install Office via the Microsoft 365 site. Download, install, or reinstall Microsoft 365 or Office 2021 on a PC or Mac - Microsoft Support, then set up Outlook and check.

Why has Microsoft Outlook stopped working?

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