How To Stop The New Outlook From Automatically Installing

Anonymous
2024-10-09T19:40:49+00:00

I need help please to stop the new outlook from automatically installing and replacing my windows and calendar app. I have uninstalled the new Outlook 4 times today. Every time I launch the old mail and Calendar app the new outlook automatically installs without my permission. It stops me from using the old app. This is very annoying. I don't want the new app. Is there any way to stop this from happening? Your advice would be appreciated.

Kind regards

Chris

Outlook | Windows | New Outlook for Windows | For business

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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Anonymous
2024-10-16T14:59:10+00:00

What worked for me was deleting the new Outlook's executable ("olk.exe") from "C:\Program Files\WindowsApps\Microsoft.OutlookForWindows".

Once it's gone, it can't forcibly launch anymore when you open Windows Mail.

You first need to take ownership of the "WindowsApps" folder, then after deleting/renaming the .exe, restore the ownership back to "TrustedInstaller" (to prevent any potential issue down the line).

Useful Links:

Credit for original solution (deleting olk.exe):

https://www.reddit.com/r/Windows11/comments/1g1ffst/block_the_windows_11_outlook_app/

Detailed instructions on changing ownership:

https://answers.microsoft.com/en-us/windows/forum/all/restore-windowsapps-permissionss-to/464e65c1-6690-493b-8cf6-c85a5ac5468a

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  1. Anonymous
    2025-05-13T17:38:35+00:00

    Thunderbird is the best mail app. No gimmicks. Just works well. Easy to set up and never any glitches. You will ask yourself why you stuck with Microsoft's inferior email apps. Thunderbird is a free and open-source email, newsfeed, chat, and calendaring client that’s easy to set up and customize.

    Mozilla Thunderbird Email

    Mozilla Thunderbird Email - Free download and install on Windows | Microsoft Store

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  2. Anonymous
    2025-05-13T07:56:04+00:00

    No unfortunately :( I am still really annoyed though, as tried many different alternative email companies, but nothing compares to the Microsoft one. I have at least 7 accounts that all need to be monitored together, but Outlook cocked that right up, so now I have to log in here there and everywhere just to access all accounts :(

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  3. Anonymous
    2025-05-09T19:13:00+00:00

    You could try rebooting and trying again to restore ownership to "Trusted Installer". Out of interest, did you succeed in getting the old Mail and Calendar app to work?

    Kind regards

    Chris

    Update:

    You can try this: When you write "NTService\TrustedInstaller" don't click on "Check Names", just click OK. It worked for me.

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  4. Anonymous
    2025-05-08T01:07:12+00:00

    I attempted to restore ownership to TurstedInstaller using this identity NTService\TrustedInstaller but when I clicked Check Names, it gave me an error. Now, I don't know what to do.

    Please advise.

    Thank you

    Joy

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