It sounds like you're experiencing a serious issue with Microsoft Teams on your Windows 10 PC. This might be a complex problem that requires specific troubleshooting steps. Here are some suggestions:
Safe Mode:
Try restarting your computer in Safe Mode and see if you can uninstall or disable Microsoft Teams from there.
Reinstall Teams:
Uninstall Microsoft Teams completely from your PC and then reinstall the latest version. This might involve going to the "Add or Remove Programs" section in your PC settings.
Registry Cleanup:
Use a registry cleaner tool to remove any potential leftover registry entries from a previous Teams installation.
Task Scheduler:
Check the Task Scheduler to ensure Teams is not set to launch at startup. You can access this by typing "Task Scheduler" in the Windows search bar.
System Restore:
Consider using System Restore to revert your computer to a point before you experienced the issue.
If the problem persists, you may want to seek assistance from Microsoft Support or your IT department. It's crucial to ensure that you have a backup of important data before attempting any significant changes to your system.