When you depend on Outlook for managing your emails, calendar, contacts, and tasks, errors like "Cannot Start Microsoft ...

Microsoft has admitted that an issue in Windows 11 24H2 could stop Outlook from starting. It has also been confirmed that Microsoft 365 Enterprise users will switch to the new Outlook in April 2026.

Designed to replace the current Mail and Calendar apps, the new Outlook can only be removed after it's been installed.

How to Repair a Microsoft Outlook PST or OST file ... such as “the file [filename].pst cannot be opened.” Outlook fails to open or crashes when accessing the PST file. Emails, contacts ...

The good news is that the February update which brings the new Outlook doesn't strip out the old version of the app, so you can still use that.

Windows 10 remains popular. However, persistent users must migrate to Windows 11 in October to continue receiving security updates. Microsoft cannot force ...