How to Fix Cannot Start Microsoft Outlook Cannot Open the Outlook Window?

Are you unable to open Outlook program? Or receiving “Cannot start Microsoft Outlook. Cannot open the Outlook window” error message? If your answer is Yes, then you are at right place. Here is how to fix “Cannot start Microsoft Outlook. Cannot open the Outlook window” error in simple steps.


Cannot start Microsoft Outlook. Cannot open the Outlook window


Possible reasons for the appearance of the above upon starting Outlook error are,

  • Add-ins conflicting your Outlook program
  • Outlook running in compatibility mode
  • Improperly configured navigation pane
  • Corrupt or damaged Outlook profile
  • Broken Outlook data files PST/OST


How to Fix Cannot start Microsoft Outlook. Cannot open the Outlook window error?

Step 1: Start Outlook in Safe Mode

  • Go to Start, type Run and hit the Enter key
  • In the Run window, type Outlook /safe, and select OK
  • Select your profile name and enable Set as default profile option in the Choose Profiles wizard
  • Click on the OK option (if prompted, provide the password and Accept to proceed)

If starting Outlook in Safe mode, you can suspect that add-in is affecting the Outlook application. In that case,

  • Select the File menu in Outlook, then Options and Add-ins
  • In the View and manage Office Add-ins window, select COM Add-ins, and Go under Manage
  • Take a snapshot of all the add-ins you have for the safety purpose
  • Remove each add-in and check if Outlook works fine after removing the respective add-in

Step 2: Outlook in Running Compatibility Mode

  • Type Outlook.exe in search field of Start menu your computer
  • Right-click the Outlook.exe file, select Properties, and switch to Compatibility tab
  • Disable Run this program in compatibility mode, hit OK and start Microsoft Office Outlook again

Step 3: Reset Navigation Pane

  • Close Outlook application
  • Go to Start and open Run window
  • Type Outlook.exe /resetnavpane and hit OK

Step 4: Creating a New Profile

  • Open Control Panel and click on Mail (if you cannot find, type Mail in the search field)
  • Click on Show Profiles button and select Add
  • Give a name for the new Outlook profile and opt OK
  • Next, go to Mail, select Data Files and set this new profile as your Default Outlook profile

Step 5: Repair Outlook Data File

  • Open Control Panel, Select File Explorer Options and go to View. Check Show hidden files, folders and drives checkbox and apply changes
  • Search and find the scanpst.exe file using Windows Explorer
  • Double click on the scanpst.exe file
  • Use Browse option, select the corrupted Outlook data file (PST) and click the Start button
  • The Inbox Repair tool scans the PST file and reports the number of found errors
  • Make backup of scanned file before repairing and click on the Repair button

In case, if your Outlook PST file not gets fixed after using Scanpst.exe utility, then take the assistance of a reliable Outlook PST Repair software like Yodot Outlook PST Repair to fix cannot start Microsoft Outlook cannot open the Outlook window error.

Software to Fix Cannot Start Microsoft Outlook. Cannot Open the Outlook Window Error:

Yodot Outlook PST Repair tool is an advanced Outlook data file repair tool, which can fix ‘Cannot start Microsoft Outlook cannot open the Outlook window' error message on Windows system. You will not face any troubles while using this tool, because it has simple on-screen instructions to fix corrupted Outlook PST files due to the above-mentioned error messages. One can also repair Outlook error 0x800ccc92, Exchange Server error 0x80072f06, set of folders cannot be opened, Outlook exited without properly closing your outlook data file error and many other errors related to Microsoft Outlook PST and OST file. It can even fix encrypted and password protected PST files. This software supports repairing of different Microsoft Outlook versions of data files such as Outlook 2007, Outlook 2003, Outlook 2000, Outlook 2016, Outlook 2013 and Outlook 2010. You can fix Outlook PST file on Windows PC or notebook running on Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2008 and 2003 operating systems.

Steps to Fix Error Cannot Start Microsoft Outlook Cannot Open. The Outlook Window:

Step 1: Launch Yodot Outlook PST Repair, click on Open PST File button and select the corrupt PST file.

(You can choose Find PST File option if, you don’t know the PST location or Select Outlook Profile option if, you have several Outlook accounts)

Step 2: Next, select the appropriate scanning mode, browse for the desired location to save repaired PST file and click on the Repair button.

Step 3: Soon after the completion of repair process, you can see the fixed Outlook PST file in Outlook styled interface.


  • Make sure you always close the Microsoft Outlook application properly
  • Take a backup of Outlook PST file on a weekly or monthly basis to be at safer side

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