I cannot install Teams on my computer

Use the following steps to troubleshoot the Teams installation failure.

1. Run the official pre‑installation check
   • Download and run the new Teams pre‑installation check script described in the article.
   • Fix any issues the script reports, then retry the installation.
2. Check for Group Policy or registry blocks
   • Open gpedit.msc and go to:
     • Computer Configuration > Administrative Templates > Windows Components > App package Deployment.
   • Ensure these policies are set to Not configured:
     • Prevent non-admin users from installing packaged Windows apps
     • Allow all trusted apps to install
   • If these policies are enforced by your organization, contact the IT admin to relax them or install Teams centrally.
3. Verify MSIX‑related registry keys
   • Ask an administrator to check these locations for restrictive values that can block the new Teams MSIX:
     • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock
     • HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Appx
   • Keys that can block installation:
     • BlockNonAdminUserInstall
     • AllowAllTrustedApps
     • AllowDevelopmentWithoutDevLicense
   • If AllowAllTrustedApps is disabled and the OS is not updated with the October 2023 (or later) cumulative update, install the latest Windows cumulative update and retry.
4. Confirm OS version support
   • If Windows 11 version 21H1 SV1 (Build 10.0.22000) is in use and Allow all trusted apps to install is disabled, upgrade Windows 11 to a newer version; otherwise the new Teams MSIX remains blocked.
5. If installing in VDI
   • For VDI environments, use teamsbootstrapper.exe and check its error code and the AppXDeployment event logs if installation still fails. Common issues include invalid paths or leftover maglevInstallationSource registry values.

If these steps do not resolve the issue, share the specific error code from the setup log or from teamsbootstrapper.exe so that the failure can be matched to the documented error conditions.

References:

• Resolve the new Teams client installation issues
• Install Teams for Virtualized Desktop Infrastructure (VDI)