Microsoft Teams won’t launch even after full system rebuild and updates

Question

Microsoft Teams won’t launch even after full system rebuild and updates

Amarnath Poddatooru 20

I am unable to launch Microsoft Teams on my Windows device. The application appears in Task Manager as running, but no window ever opens on the desktop.

Troubleshooting steps already completed:

Fully rebuilt/reimaged the laptop

Installed all Windows Updates

Cleared Teams cache (%appdata%\Microsoft\Teams)

Uninstalled and reinstalled Teams

Removed Teams Machine-Wide Installer

Tried launching via %localappdata%\Microsoft\Teams\Update.exe --processStart "ms-teams.exe"

Reset Teams from Windows Apps settings

Verified it is not opening off‑screen

Confirmed no error messages appear

Despite all of the above, Teams still does not open. It only shows as a background process in Task Manager.

I need assistance diagnosing why Teams will not launch and resolving the issue.

0 comments

Answer accepted by question author

Demi-N 18,735 Microsoft External Staff Moderator

Hello Amarnath Poddatooru,

Thank you for sharing such detailed information and for all the troubleshooting steps you’ve already tried, I really appreciate the effort you’ve put into this. I understand how frustrating it must be, especially after a full system rebuild.

To help narrow this down further, could I kindly ask you to try a couple of additional checks?

First, could you please confirm whether Teams works via the web by accessing: https://teams.microsoft.com

This will help verify if the issue is limited to the desktop application or not.

Next, it would be helpful to test with a new local Windows user profile, as sometimes this type of behavior can be related to the user profile environment. You can follow this guide to create a new user account: Manage User Accounts in Windows - Microsoft Support

User's image

Once created, please sign in with the new profile and try launching Teams there to see if the behavior is the same.

If the issue still persists after that, I would recommend performing a clean uninstall of Teams using the official steps here: Uninstall the Teams client - Microsoft Teams | Microsoft Learn

After completing the uninstall, please reinstall Teams using the latest version following this guide: Bulk deploy the Microsoft Teams desktop client - Microsoft Teams | Microsoft Learn

This ensures that all components are reinstalled properly.

Please take your time with these steps, and once you’ve had a chance to test them, feel free to update me with the results. I’ll be glad to continue working with you to get this resolved.

Thank you very much for your patience and cooperation.

Best regards,

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Amarnath Poddatooru 20 Reputation points

2026-06-14T02:57:25.5466667+00:00
Hi @Demi-N ,

Thank you kindly for your reply.

I was able to log in via https://teams.microsoft.com/ — this has been my backup option.

I created a second local Windows user profile as per your advice, using my Gmail-based Microsoft account. From that new Windows profile, I was able to launch Teams and sign in successfully.

However, after I signed out of Teams and signed in with my Yahoo-based Microsoft account, the same issue returned. At that point, I suspected the issue might be related to locally stored Microsoft credentials or sign-in tokens.

I then opened Credential Manager and deleted the Microsoft-related saved credentials shown there.

After that, I went to Microsoft Teams under Apps management and used the Advanced options to Terminate, Repair, and Reset the app.

I restarted the laptop.

I was then able to launch Teams successfully and sign in to Teams again.

Thank you again for your help. Your guidance on trying a secondary local Windows user profile helped isolate the issue and ultimately resolve it.

Have a great day.

Best regards,
Amarnath.
Demi-N 18,735 Reputation points Microsoft External Staff Moderator

2026-06-15T09:46:27.66+00:00

Hi Amarnath Poddatooru,

Thank you for your detailed update, I really appreciate the effort you put into testing and documenting all the steps.

It’s great to see how you were able to narrow down the issue and resolve it. I also learned something from your approach, so thank you for sharing that.

Glad to hear everything is working now, and please feel free to reach out anytime if needed.

Best regards,

1 additional answer

Your answer

Amarnath Poddatooru 20 Reputation points

2026-06-14T02:57:25.5466667+00:00

Hi @Demi-N ,

Thank you kindly for your reply.

I was able to log in via https://teams.microsoft.com/ — this has been my backup option.

I created a second local Windows user profile as per your advice, using my Gmail-based Microsoft account. From that new Windows profile, I was able to launch Teams and sign in successfully.

However, after I signed out of Teams and signed in with my Yahoo-based Microsoft account, the same issue returned. At that point, I suspected the issue might be related to locally stored Microsoft credentials or sign-in tokens.

I then opened Credential Manager and deleted the Microsoft-related saved credentials shown there.

After that, I went to Microsoft Teams under Apps management and used the Advanced options to Terminate, Repair, and Reset the app.

I restarted the laptop.

I was then able to launch Teams successfully and sign in to Teams again.

Thank you again for your help. Your guidance on trying a secondary local Windows user profile helped isolate the issue and ultimately resolve it.

Have a great day.

Best regards,
Amarnath.
Demi-N 18,735 Reputation points Microsoft External Staff Moderator

2026-06-15T09:46:27.66+00:00

Hi Amarnath Poddatooru,

Thank you for your detailed update, I really appreciate the effort you put into testing and documenting all the steps.

It’s great to see how you were able to narrow down the issue and resolve it. I also learned something from your approach, so thank you for sharing that.

Glad to hear everything is working now, and please feel free to reach out anytime if needed.

Best regards,

Answer 1

Deleted

This answer has been deleted due to a violation of our Code of Conduct. The answer was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Comments have been turned off. Learn more