Microsoft Outlook comes in two varieties: there's the Outlook.com email service and the Outlook inbox software. In the case of the latter product, you may run into a ...

If when using Microsoft Outlook on your Windows PC, you receive a message – Cannot start Microsoft Outlook, The command line argument is not valid, Verify the switch you are using, then here are some ...

Microsoft has fixed a known issue affecting Outlook for Microsoft 365 users since June and causing slow starts and freezes as if Offline Outlook Data Files (OST) were syncing right after launch.

Q. Whenever I open Outlook, I am greeted with a message that says "Cannot start Microsoft Outlook. Cannot open the Outlook window." How can I fix this problem and get back to using Outlook? A. This ...