How to block new Outlook app automatic install on Windows 10

On Windows 10, you can prevent the system from downloading and installing the new Outlook app by modifying the Registry. In this guide, I’ll outline the steps to complete this configuration.

As expected, Microsoft has already started the force rollout of the new Outlook app for Windows 10 devices with the release of the KB5051974 update (also known as the February 2025 update). However, you can still prevent the company from forcibly pushing the new email client on your computer, but you will have to edit the Registry.

Furthermore, if the app is already installed on your computer, you will also have to uninstall the Outlook app manually.

Although many users have demonstrated their dislike and frustrations with the new Outlook app because of its lack of features, problems, and design changes, it’s the only (mostly) free email client that you can use in the operating system.

Also, you should consider that the company discontinued the default Mail and Calendar app on Windows 11 and 10. While you can still use these apps, they’re no longer maintained. You may still be able to use the classic Outlook app, but this email client is expected to retire in 2029.

In this guide, I’ll outline the steps to stop Microsoft from pushing the new Outlook app automatically on your computer.

Warning: Before proceeding, it’s crucial to acknowledge the risks associated with modifying the Windows Registry. Incorrect changes can lead to system instability or operational issues. Therefore, ensure you have a full system backup before making any changes. Proceed with caution and understanding.

Block automatic install of new Outlook app on Windows 10

To prevent Windows 10 from installing the new Outlook app, follow these steps:

Open Start.
Search for regedit and click the top result to open the Registry.

Browse the following path:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe

Right-click the UScheduler_Oobe (folder) key, select the New submenu, and choose the String Value option.
Name the new key BlockedOobeUpdaters and press Enter.
Right-click the newly created key and choose the Modify option.
Change the value to [“MS_Outlook”].
Click the OK button.
Restart the computer.

Once you complete the steps, the operating system won’t force the new Outlook app on your computer.

Uninstall new Outlook app

If the email client is already installed on your computer, you will have to uninstall it manually with these instructions:

Open Settings.
Click on Apps.
Click on Apps & features.
Select the “Outlook (new)” app from the list.
Click the Uninstall button.
Click the Uninstall button again.

If the option to uninstall the app isn’t available, you can use PowerShell:

Open Start.
Search for PowerShell, right-click the top result, and choose the Run as administrator option.
Type the following command to uninstall the new Outlook app from Windows 10 and press Enter:
```
Get-AppxPackage Microsoft.OutlookForWindows | Remove-AppxPackage
```

After you complete the steps, the email client will be removed from Windows 10.

If you change your mind, you can always reinstall the new Outlook app from the Microsoft Store.

It’s important to note that these instructions will remove the new version of the app, and you can revert to the classic version of Outlook. However, the Mail and Calendar apps are no longer supported, meaning you won’t be able to use them anymore.