Select your Outlook profile and click OK.Enter Outlook /safe in the input field and press the OK button.Launch the Run tool by pressing Windows + R keys.You can run Outlook in safe mode to confirm if the problem is caused by add-ins. As a result, you may encounter the ‘cannot open the Outlook window’ issue. Sometimes, these add-ins interfere with Outlook. Outlook add-ins help in enhancing the user experience as they offer certain features that don’t exist in the base application.
Try the following methods to resolve the ‘cannot start Microsoft Outlook’ error: 1. How to Fix “Cannot Start Microsoft Outlook” Error? This error prevents Outlook users from using the application. Cannot open the Outlook window” error is one of the prevalent errors that Outlook users face. For instance, the “Cannot start Microsoft Outlook. However, Outlook users occasionally run into problems with the application. Microsoft Outlook is a powerful email client that offers many useful features for information management.