You might have installed a new program on your computer which fails to work properly with Outlook, or your machine might have a virus. Whatever the exact problem, there are a few crucial troubleshooting steps to do that can be helpful which is mentioned in this article which helps you to know how to fix Microsoft Outlook not working or Microsoft Outlook login errors. All you can do to fix Microsoft Outlook issues is contact Microsoft Outlook help centre via calling this number +1 8886252848 or you can go with this blog to find some troubleshooting.
https://www.one-stophub.com/microsoft-outlook-not-working