How to Fix Installation Has Failed Error on Microsoft Teams
I'm betting that most people absolutely hate using Microsoft Teams for a range of different reasons but are forced to do work purposes. Apart from being clunky, unintuitive and outright dull it's also got a done of problems hidden away inside of it, with the biggest and most common being installation error - “Installation has failed. There was an error while installing the application. Check the setup log for more information and contact the author.” This prevents you from doing anything else with Microsoft Teams, so follow along as we guide you through quite a few troubleshooting steps that should solve this problem.
How to Fix Installation Has Failed Error on Microsoft Teams
As with most Microsoft software and tools, there are quite a few different things that cause this error message 5 of the most common are listed below.
- Security software interference: Antivirus programs may block the installer from making necessary system changes.
- Corrupt or incomplete installation files: Failed or interrupted installations can leave behind problematic files.
- Insufficient user permissions: The installer may require elevated privileges to access system directories.
- Conflicts with existing installations: Residual files from previous installations can disrupt new setups.
- Windows Installer service issues: If this service isn't functioning properly, software installations may fail.
Run the Teams Installer as Administrator
While it probably won't solve your problem it only takes a second to do so try running your Teams installer with admin privileges.
- Locate the Microsoft Teams setup file.
- Right-click the file and select Run as administrator.
- Confirm any User Account Control (UAC) prompts.
- Follow the installation steps and check if the issue is resolved.
Uninstall Previous Versions of Teams
Make sure any older versions of Teams are completely removed before trying to install a new version of Teams. Microsoft Teams is super fragile and gets corrupted and confused very easily.
- Open Control Panel and navigate to Programs > Uninstall a Program.
- Locate Microsoft Teams, right-click, and select Uninstall.=
- Follow the prompts to remove the application.
- Open File Explorer with Win + E and enable hidden files under the View tab.
- Navigate to C:\Program Files\WindowsApps and delete or rename the Microsoft Teams folder.
- Type %AppData% in Windows search and press Enter.
- Delete the Teams folder.
- Restart your system and reinstall Teams.
Temporarily Disable Antivirus and Firewall
If you are using a third-party antivirus or firewall tool it could be causing problems so disable it/them then try to install Teams. If you are using Windows Defender you can skip this step as it won't cause any issues with the installation.
- Temporarily disable your third-party security software.
- Open Control Panel > System and Security > Windows Defender Firewall.
- Select Allow an app or feature through Windows Defender Firewall.
- Click Change settings and enter your administrator password if prompted.
- Find Microsoft Teams and check both Private and Public boxes.
- Click OK to save your changes.
Clear Teams Installation Cache
Corrupt cache files can block the installation process.
- Close Microsoft Teams completely.
- Open File Explorer with Win + E and ensure hidden files are visible.
- Navigate to %appdata%\Microsoft\teams.
- Delete the contents of these folders:
application cache\cache
blob_storage
Cache
databases
GPUcache
IndexedDB
Local Storage
tmp
- Empty the Recycle Bin or use Shift + Del to permanently delete files.
- Restart your system and try installing Teams again.