Win11 - Prevent MS Teams from reinstalling

[kingozrecords]

The Microsoft Teams chat popup thing is the worst; no matter whose guide you follow it always comes back. Computers are supposed to be simple and easy to use; talk about annoying. I guess the reason it is so, is because it re-installs itself, and there's special permissions given to the trustedinstaller built in that you can't undo in any reasonable amount of time.

It took me a week or two to come up with a working fix to this issue. But it came down to a good reddit post by Ichabod to solve it.

Screenshot 2024-01-23 034815.png

So, what he is suggesting is to create a .bat file from a text file; name it whatever. paste this text into it:

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Get-AppxPackage -Name *MicrosoftTeams* -AllUsers | Remove-AppPackage -AllUsersGet-AppxProvisionedPackage -Online | Where-Object {$_.PackageName -like "*MicrosoftTeams*"} | Remove-AppxProvisionedPackage -Online

Copy-Item -Path "\\path to file\SetACL.exe" -Destination "C:\Deployments\"

C:\Deployments\SetACL.exe -on "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Communications" -ot reg -actn setowner -ownr "n:Everyone"

C:\Deployments\SetACL.exe -on "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Communications" -ot reg -actn ace -ace "n:Everyone;p:full"

REG ADD "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Communications" /v ConfigureChatAutoInstall /t REG_DWORD /d 0 /f

C:\Deployments\SetACL.exe -on "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Communications" -ot reg -actn setowner -ownr "n:NT Service\TrustedInstaller"

C:\Deployments\SetACL.exe -on "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Communications" -ot reg -actn trustee -trst "n1:Everyone;n2:;ta:remtrst"

Remove-Item C:\Deployments\SetACL.exe -recurse

reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Chat" /v ChatIcon /t REG_DWORD /d 3 /f

And, as dcg1k says; I added a line.

Download this: https://helgeklein.com/download/

Screenshot 2024-01-23 040357.png

press "Download the EXE version of SetACL 3.1.2 for 32-bit and 64-bit Windows" (like above).

Unzip, find "SetAcl.exe", place it in:

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C:\Deployments\

run the bat file, delete the deployments folder; all done.

[legendCNCD]

Use Win11Pro, disable defender/updates via GPO, update when you want. No more sudden updates or extras.

[Shinizzle]

MS have finally added two useful settings into teams now, disable auto start and close (not minimise to system tray) and surprisingly they actually work.

[kingozrecords]

MS have finally added two useful settings into teams now, disable auto start and close (not minimise to system tray) and surprisingly they actually work.

the chat still tried to open itself at the bottom left for those that upgraded to 11 from 10. That's only for a fresh install; you'd need to hunt down the .msi installer, and the image repository and rebuild; I read about it on github to have the system resources and image to do what you're saying. It's not on the windows acquisition files otherwise.