“Cannot start Microsoft Office Outlook. Cannot Open the Outlook Window.” This issue seems to be caused by either an add-on or a navigation pane within the Outlook program being moved in to a position that is illegal within the Outlook program.
- On the desktop of the computer that receives the error message, close all open windows
- On your keyboard, hold the Windows key and tap the letter R.
- In the Run dialog box that opens, type “outlook.exe /resetnavpane” without the quotes.
- Now run Outlook and you should be fine!