Microsoft Outlook won’t open in Windows 10 / 11 Fix

Is Microsoft Outlook not starting up on your Windows 10 PC? Is it dispensing an error code “Cannot start Microsoft Outlook. Unable to open Outlook window” and you are in desperate need of a fix? If you are, then you have just landed at the right place. We are going to detail some easy fixes to solve the problem on your computer. This error usually occurs due to faulty navigation panel, broken add-ins, etc.

Fix 1 – Repair MS Office

Repairing MS Outlook should identify and solve the issue.

1. Press the Windows key+R.

2. Then, press “appwiz.cpl” and hit Enter.




3. After that, you need to find the “MS Office” package.

4. Next, you have to right-click on the installed office package and then click on “Change“.


Change Office


5. Click on the radio button beside “Quick Repair“.

6. After that you have to click on “Repair“.


Quick Repair


Follow the on-screen instructions to solve the problem. This should fix the issue.

Fix 2 – Reset Navigational Pane

One of the most common problems is the faulty navigational pane.

1. Right-click on the Windows icon. Then, click on the “Run” window.

2. Then, type this code and hit Enter.

outlook.exe /resetnavpane


Reset Navpane


This will reset the navigation pane that may have caused the issue on your computer.

Fix 3 – Start Outlook in safe mode

As we discussed, one of the reasons includes broken add-ins in MS Outlook.

1. Press Windows key+R to access the Run terminal.

2. To start Outlook in Safe mode, copy-paste this code and click on “OK“.

outlook.exe /safe


Outlook Safe Mode


This will start the MS Outlook in safe mode, excluding any foreign add-ins.

Fix 4 – Create a New Outlook account

1. Open control panel.

2. Click on View by Large icons


Large Icons Control Panel


3. Now, Select outlook and choose remove.


Remove Outlook


4. Click on Apply and Ok and close the window.

5. Now, press windows key + r key together to open run.

6. Now, type outlook.exe in it and click OK.

Outlook Exe


7. Now, enter your credentials (Name, email and password) and create the profile.

Fix 5 – Disable all add ins in Outlook

1 -Open Outlook.

2 – Click on File


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3 – Click on Options

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4 – Click on Add ins from the left menu.

5 – Now, click on Go button to the right of COM Add-ins


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6 – Now, Uncheck all add ins and click OK.

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Now, try again and see if Microsoft Outlook is opening or not.

15 thoughts on “Microsoft Outlook won’t open in Windows 10 / 11 Fix”

  1. THANK YOU Sambit! I was not aware of the repair app within Office and it worked fine. And thank you for sharing your knowledge freely — the sign of an advanced soul!

  2. Option 3 – Repair worked like a charm. Have spent over a week trying to get this sorted and went down the repair path before but it never worked and it was never easy. This was simple, quick, well explained and easy. Thank you!

  3. THANK YOU! I went through 8 or 9 different links to try to find a solution. All very confusing. This was precise and fixed the problem. I have saved this page in my documents.

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