I have issues in my MS Teams and i want to Uninstall and Install Teams again

On Windows, fully uninstall Teams by removing both the app and the machine-wide installer:

1. Quit Teams by right-clicking the Teams icon in the taskbar and choosing Close window.
2. Open Start > Settings > Apps.
3. Under Apps & features, search for teams.
4. Select Microsoft Teams > Uninstall.
5. Confirm Uninstall, then approve the prompt to allow changes.
6. Select Teams Machine-Wide Installer > Uninstall.

If the issue is with the new Teams client and a reinstall is needed, Teams can also be removed with PowerShell:

• For all users:

Get-AppxPackage *MSTeams* -AllUsers | Remove-AppxPackage -AllUsers

• For the current user:

Get-AppxPackage *MSTeams* | Remove-AppxPackage

To remove Teams machine-wide:

teamsbootstrapper.exe -x -m

If Teams is failing to launch or behaving incorrectly before reinstalling, these supported steps can help:

1. Quit the Teams desktop app fully and restart it.
2. Check for Teams updates.
3. Clear the Teams cache.
4. If needed, uninstall and reinstall the Teams desktop app from the Microsoft Store.

Important: if classic Teams was deployed machine-wide by an admin, make sure new Teams is deployed machine-wide before removing the Teams Machine-Wide Installer, or users can be left without a Teams client.

References:

• How to uninstall the Teams client
• Desktop
• How to fix app, audio, and GPU issues for immersive spaces | Microsoft Support
• Uninstalling classic Microsoft Teams