Outlook updating conflicts
Before starting Outlook or any other Office application, make sure you apply the latest Service Pack and updates first.
When you are using Office 365 or a Click-to-Run installation of Outlook 2013, 2016 or 2019, you’re automatically being kept up-to-date.
This also applies when you attempt to run Outlook 2007 or previous on Windows 10; It will not help you and it could even make things worse!
All the basic troubleshooting steps still apply when running Outlook on Windows 10.
Due to this, Outlook struggles to provide a smoother access to user mailboxes and can eventually end up “Not responding”.
All the above-mentioned causes and the corresponding error message occurred in earlier versions along with the recent Outlook 20.Safe mode loads the Outlook without any add-ins and customization files.This can be done by following the below-mentioned steps. Disable your Outlook add-ins If you experience the “Outlook Not Responding” error for the first time, then try turning off the recently installed add-ins one-by-one.It provides great flexibility by acting as a connectivity tool for much professional software.However, such software or professional Outlook add-ins are not reliable and can lead to improper functioning of the Outlook.