$TeamsPath = [System.IO.Path]::Combine($env:LOCALAPPDATA, ‘Microsoft’, ‘Teams’)
$TeamsUpdateExePath = [System.IO.Path]::Combine($env:LOCALAPPDATA, ‘Microsoft’, ‘Teams’, ‘Update.exe’)

try
{
if ([System.IO.File]::Exists($TeamsUpdateExePath)) {
Write-Host “Uninstalling Teams process”

# Uninstall app
$proc = Start-Process $TeamsUpdateExePath “-uninstall -s” -PassThru
$proc.WaitForExit()
}
Write-Host “Deleting Teams directory”
Remove-Item –path $TeamsPath -recurse
}
catch
{
Write-Output “Uninstall failed with exception $_.exception.message”
exit /b 1
}

this worked for me. Thanks a ton.

This is probably because you have an active AppLocker policy. You need to allow Teams application to run from the user profile.
Putting this here in case someone else runs in to this problem.

I am getting error “Installation has failed: Failed to extract installer” when the user login.

Please help me to resolve this issue.

Many thanks.

Regards
Dash

then run %ProgramFiles(x86)%\Teams\current\teams.exe

go in the registry to: under your current admin user and go to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

look for the string value: com.squirrel.Teams.Teams

It should have this: “C:\Program Files (x86)\Teams\Update.exe –processStart “Teams.exe” –process-start-args “–system-initiated”

copy the string Name and value or just remember it.

export the key to make a backup in case you do forget it.

delete the string from current user.

then go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

and add the same string value.

right click -> new string name: com.squirrel.Teams.Teams

Value data should be: C:\Program Files (x86)\Teams\Update.exe –processStart “Teams.exe” –process-start-args “–system-initiated”

add that and exit out and see if it works.

then run %ProgramFiles(x86)%\Teams\current\teams.exe

go in the registry to: under your current admin user and go to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

look for the string value: com.squirrel.Teams.Teams

It should have this: “C:\Program Files (x86)\Teams\Update.exe –processStart “Teams.exe” –process-start-args “–system-initiated”

copy the string Name and value or just remember it.

export the key to make a backup in case you do forget it.

delete the string from current user.

then go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

and add the same string value.

right click -> new string name: com.squirrel.Teams.Teams

Value data should be: C:\Program Files (x86)\Teams\Update.exe –processStart “Teams.exe” –process-start-args “–system-initiated”

add that and exit out and see if it works.

It does. I use the PS-script, and it nicely installs teams for a test user. All seems to work (after having to tweak app-locker a dozen times), except for the placement of a shortcut on the user’s desktop. Thank you very much for the time and trouble you took to write this post.

Did you ever come up with a solution to “Register chat app” as an admin for certain users?