If you are having difficulties with starting Outlook after you upgraded to Windows 10, see the guide: Windows 10 and Outlook and more specifically the section PST File access is denied. This guide explains all you need to know about that in order to get your Outlook to start without errors again.Īside from solving problems with starting Outlook, this guide can also be used as a base to troubleshoot other common Outlook issues. Getting Outlook to work again properly when experiencing startup errors, crashes or hangs (Not Responding in the Title Bar) often is not that hard but it does require some specific knowledge about the inner workings of Outlook.