Teams will not open

Teams Will Not Open (Try This Fix FIRST!)

Attempting to join an early morning meeting only to discover Microsoft Teams will not launch? I’ve been there on a number of occasions and I understand how frustrating it can be. Here are some proven troubleshooting steps you can follow to get your Teams application running smoothly again.

Teams Will Not Open

If Teams will not open, force quit the application, restart your computer, and attempt to relaunch. If the issue persists, make sure Teams is not blocked by Windows Security or Windows Firewall. As a final measure, clear cache, check for software updates, and uninstall and reinstall Teams.

That’s it! Typically one of these troubleshooting steps will solve the problem.

I recommend you follow these steps in the order detailed below. We will start with the quick and low effort troubleshooting steps, followed by the slightly more time consuming and involved fixes.

Step 1: Quit And Reopen Teams

When you close an application on your PC completely, it needs to re-launch and reload all of its resources the next time you open the application.

Believe it or not, this simple act can fix a ton of different application bugs.

Therefore the first step is to simply quit and then reopen Teams.

To fully quit Teams, locate the Teams icon in the application tray in the bottom right corner of your screen. Right click on the icon and click Quit.

Quit Microsoft Teams

Once you re-launch the application, you should be able to type normally again.

If you encounter any difficulties when attempting to fully quit Teams, you can always try hard resetting the application.

To do so, open the Task Manager by pressing CTRL, ALT, DEL.

Force quit Teams in Task Manager

Right click on Microsoft Teams and click End task to fully close all MS Team windows.

Now go ahead and attempt to relaunch the application.

Step 2: Restart Your Computer

Some folks will discover the issue persists even after force quitting MS Teams.

In these instances, I recommend you also try restarting your computer before attempting any additional fixes.

Rebooting your PC flushes the RAM and clears up temporary files and processes which can sometimes do the trick.

Step 3: Unblock Teams Through Windows Security

It is also important to note that Windows Security has a built-in antivirus program.

While Windows Security protects your device and your data, it can also cause certain apps to be blocked by default.

Many users find that Teams is stuck on the loading screen and won’t open because the application is actively being blocked by Windows Security.

If this is the case, you will need to manually add MS Teams as a trusted allowed app.

To unblock Teams through Windows Security:

  1. First, navigate to the Start menu and select Settings.
  2. Then, select Update & Security > Windows Security > Virus & threat protection.
  3. Next, scroll to the bottom of the window and under Ransomware protection click Manage ransomware protection.
  4. Now, click on Allow an app through Controlled folder access > Add an allowed app > Browse all apps.
  5. Finally, select Microsoft Teams and click Open.

Step 4: Allow Teams App Through Windows Firewall

Similarly, it is also possible that your Teams application is getting caught up in Windows Firewall.

To allow Teams to communicate through Windows Firewall:

  1. First, navigate to the Windows search bar and type “firewall” and select Allow an app through Windows Firewall.
  2. Then, click Change settings > Allow another app > Browse.
  3. Now, under Local Disk (C:), within the folder explorer window, click View from the menu at the top and make sure Hidden items is selected.
    File Explorer View Hidden Items
  4. Next, within the C Drive go to Users > Username > AppData > Local > Microsoft > Teams > Update and click Open and Add.
  5. Finally, click on Allow another app again followed by Browse and this time within the same Teams folder, select current and then Teams. Click Open and Add.

Step 5: Clear Teams Cache

At this stage, if still Microsoft Teams will not open, try clearing the cache.

Clearing the Microsoft Teams cache memory is a great way to address a variety of issues with the Teams application.

To clear cache in Teams:

  1. First, close out of Microsoft Teams and Quit the Teams application from the icon tray.
  2. Then, use the file explorer to enter and search for the following file path: %appdata%\Microsoft.
  3. Next, Delete the entire folder named “Teams”.
  4. Lastly, open the Microsoft Teams Desktop app and sign-in.

Step 6: Check For Microsoft Teams Updates

Microsoft Teams routinely pushes out software updates to improve application capabilities, performance, security and reliability. Many of these improvements can even help prevent Teams from running slowly!

For this reason, it is also important to stay up-to-date with the latest Teams version.

In most cases, Teams should update automatically.

However, by clicking ‘Check for updates’, you force Microsoft Teams to identify the latest updates and push those updates directly into the app.

You can also check for available updates by first selecting the Settings and more ellipses symbol (…) in the top, right hand corner of your Teams window and then clicking Check for updates.

Do not skip the final step of checking for updates!

Many users find that once they clear the Teams cache, certain features revert back to older software versions.

Step 7: Uninstall And Reinstall Teams

When all else fails, it is time to uninstall and reinstall your Microsoft Teams desktop application.

It is important to note, that in order to fully uninstall Teams, you must uninstall both the application and the installer. Therefore, it is important to follow each of the steps below in order.

To uninstall Microsoft Teams:

  1. First, close out of Microsoft Teams and Quit the Teams application from the icon tray.
  2. Then, click on the Start button and select Settings and Apps.
  3. Next, click Apps & features, search for ‘Teams’, click on Microsoft Teams, then select Uninstall.
  4. Now, select Uninstall again in the window that appears, followed by YES to proceed with uninstalling.
  5. Lastly, select Teams Machine-Wide Installer and click Uninstall. Then follow the same process described in step 5.

With MS Teams now fully uninstalled from your PC, you are ready to head over to the official Microsoft Teams download page and reinstall the application!


Are you getting frustrated and wondering why your MS Teams won’t launch? Fortunately there are 7 proven troubleshooting steps you can try.

Teams Will Not Open – Top 7 Fixes

  1. Quit and reopen Teams
  2. Restart your computer
  3. Unblock Teams through Windows Security
  4. Allow Teams app through Windows Firewall
  5. Clear Teams cache
  6. Check for Microsoft Teams updates
  7. Uninstall and reinstall Teams

Each of these updates both within the Teams application and on your PC should enable you to get back to business as usual.

If this post helped you fix the issue, or if you solved your issue some other way, be sure to leave me a comment below so that we can include it!

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