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Hi,

Thank you for writing to Microsoft Community Forums.

We understand that you are facing issues opening Microsoft Teams                    

In order to get clarity and to assist you accordingly, please reply with the answers to the questions below:

• Are you aware of any changes on the PC prior to this issue?

Meanwhile, we would like to suggest that you perform the methods below and check if the issue persist:

Method 1: Repair/Reset app

Refer to the link given below to repair/reset Microsoft Teams app

https://support.microsoft.com/en-us/windows/repair-apps-and-programs-in-windows-10-e90eefe4-d0a2-7c1b-dd59-949a9030f317

Method 2: Check new user profile

https://support.microsoft.com/en-us/windows/create-a-local-user-or-administrator-account-in-windows-10-20de74e0-ac7f-3502-a866-32915af2a34d

If the issue persists, I would suggest you to uninstall Microsoft Teams using the link given below:

https://support.microsoft.com/en-us/office/uninstall-microsoft-teams-3b159754-3c26-4952-abe7-57d27f5f4c81

Once it is uninstalled, download and install it from the link given below:

https://www.microsoft.com/en-in/microsoft-teams/download-app

Note: These articles are for Windows 10, holds good for Windows 11

Let us know how it goes.

Vineet Kumar

Microsoft Community – Moderator