An unexpected error has occurred

Question

Howdy,

recently I installed Windows 10 on my PC using work email (set up for an organization -> Windows 10 Business). I have downloaded Office 365 and every app works fine except for Outlook. Whenever I try to open it, I get the error "An unexpected error has occurred" and it shuts down.

I tried:

• reinstalling Office 365
• Online repair tool
• Offline installation from an ISO file
• Microsoft Support and Recovery Assistant (SARA)
• Opening in Safe mode
• Creating new profile
• Deleting XML files
• Reinstalling Windows 10
• Upgrading to Windows 11
• every YouTube video/web tips

When I set up a Local account (no email) everything works fine. I have also encountered this problem with every new PC.

Here is a link to a post that describes the same issue, but it's not resolved: link

The online version works normally, I don't have any issues there. Is there any solution to this problem?

Best regards,

Michał

Answer 1

In case you have foreign characters in your Windows username follow those steps:

1. Go to region settings
2. On the right side click on "Additional date, time & regional settings"
3. Press "Region" and select the "Administrative" tab
4. In "Language for non-Unicode programs" click on "Change system locale..." and select your language.

After rebooting, your Outlook should work! :)

Answer 2

Hello michal.olszewski,

Good day! Thanks for posting in Microsoft Community.

I have checked your second reply and I am glad, it seems you have found a solution to the error you were getting.

However, if that is not the case, for further troubleshooting and investigation ,please share your Office version About Office: What version of Office am I using? (microsoft.com), also let us know if you can log in to Outlook on the Web without issues.

Here is a sample of the screenshot:

We are looking forward to your reply. Thank you for your cooperation. 

Sincerely,

Simbarashe | Microsoft Community Moderator