Help Needed to Uninstall and Restore New Outlook After Using Custom Batch File

Question

Hello,

I recently followed the steps from a Reddit post (https://www.reddit.com/r/Windows11/comments/1g20cmc/tip_you_can_prevent_new_outlook_from_installing/) and installed files from the ZIP provided. I ran the outlook.bat batch file as an administrator, which altered the system to prevent the installation of the new Outlook.

Unfortunately, I am now facing issues trying to restore the New Outlook application. Here are the details:

Current Issue:

I am attempting to reinstall Outlook for Windows via the Microsoft Store but receive error code 0x80073CFB: The provided package is already installed, and reinstallation of the package was blocked. This suggests that the patch or modification applied by the batch file is still present on the system.

Steps I Have Taken:

1. Ran the batch file as instructed to prevent the New Outlook installation. Attempted to remove patch or modification using PowerShell commands like: powershellget-appxpackage -allusers Microsoft.OutlookForWindows | Remove-AppxPackage -allusers *and
   *
   Remove-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock -Name AllowDevelopmentWithoutDevLicense -ErrorAction SilentlyContinue
2. Tried resetting the Microsoft Store, but the error persists.

Question:

How can I completely undo these changes and restore the ability to install the New Outlook from the Microsoft Store?

Any guidance on fixing the error 0x80073CFB and fully reverting the patch would be greatly appreciated.

Thank you in advance!

Answer 1

Hi @FnD ,

Welcome to our forum!

According to your description, i understand that you have tried the steps in the third-party article to prevent the installation of the new Outlook. Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client and know little about the content mentioned in the third-party article.

Unfortunately, I am now facing issues trying to restore the New Outlook application.

Do you mean that you want to restore New Outlook?

Generally, we can try the methods as mentioned in this official article: Switch to new Outlook for Windows.

Hope to help you!

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