If you are using Microsoft Teams you’ve probably seen your fair share of error messages over the last year or so. These errors range in variety and have a ton of different error codes and messages, though all of them cause the same problem. The inability to sign into the Microsoft Teams app on your PC. Thankfully, there are a range of quick and easy fixes you can use to troubleshoot the problem.

Related: How to fix Microsoft Teams error ‘We weren’t able to register your device’ Error CAA2000B.

Microsoft Teams is one of the most popular pieces of remote working software currently on the market. It’s free, relatively easy to use and has just about every feature you could possibly require for most day to day tasks and cooperative teamwork. Annoyingly, however, Microsoft Teams has a tendency to prevent users from signing into the app for a range of different reasons.

Over the years we’ve covered dozens of Microsoft Teams errors and issues, including a ton of different error codes. You can check them all out here if you have some other issues you need to resolve. Otherwise, proceed with the steps shown below to solve Microsoft Teams error 80090016 - Your computer’s Trusted Platform Module has malfunctioned. If you’re in a rush to use Teams, just use the web version for the time being. It’s not ideal but it will allow you to get access quickly without any sign-in issues.

How do you fix Microsoft Teams Error Code 80090016 - Your computer’s Trusted Platform Module has malfunctioned.

The quickest and easiest way to solve Teams Error Code 80090016 on Windows is to simply uninstall the Microsoft Teams app from your computer. Once you have uninstalled it you’ll need to clear the Teams cache folder (which doesn’t remove when you uninstall the app). This will allow you to install Teams in an entirely fresh state. If you don’t manually wipe the cache you will almost always get the same error occurring again.

To clear your Microsoft Teams cache on Windows 10 you’ll need to do the following.

  • First, open the Run tool by pressing Windows Key + R.
  • Next copy and paste %appdata%\Microsoft\teams\Cache into the text box and press Enter. This will open a File Explorer window in the exact location of one of Teams caches. Press Ctrl+A to select everything within the location then press Delete to delete it all. Once you have deleted everything do the same for all of the following locations:

%appdata%\Microsoft\teams\application cache\cache





%appdata%\Microsoft\teams\Local Storage


Fix Teams error error 80090016 solution

After you have cleared all of the above locations, restart your computer, then reinstall the Microsoft Teams app on your computer. Once you have reinstalled the app you should be able to sign in normally again. You can usually use this exact same method to solve a range of other Microsft Teams sign-in errors.

Can’t sign into Microsoft Teams using the web version?

If you can’t sign into Microsoft Teams using the web version because you keep getting stuck in a weird email address loop. Check out the following guide: How to fix Microsoft Teams can’t change sign-in email address.