Create a Custom Detection Script for LM Studio (PowerShell)

Microsoft Endpoint Manager Configuration Manager (MEMCM / SCCM) and Microsoft Intune use Detection Rules to determine the presence of Applications & Win32 Apps. The detection rules ensure that application installations only begin to run if the application is not already installed on the device. This article will serve as an informative guide and give you a clear understanding of how to create an updated custom detection script for each new version of LM Studio using PowerShell.

How to Create a Custom Detection Script for LM Studio

LM Studio (Registry Detection Method)

## Check for LM Studio (Registry Detection Method)
$LMStudio = Get-ChildItem -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall" | Get-ItemProperty | Where-Object {$_.DisplayName -match 'LM Studio' } | Select-Object -Property DisplayName, DisplayVersion, PSChildName
$LMStudio.DisplayVersion
$LMStudio.PSChildName


## Create Text File with LM Studio Registry Detection Method
$FilePath = "C:\Windows\Temp\LM_Studio_Detection_Method.txt"
New-Item -Path "$FilePath" -Force
Set-Content -Path "$FilePath" -Value "Function Get-LoggedOnUserSID {"
Add-Content -Path "$FilePath" -Value "## ref https://www.reddit.com/r/PowerShell/comments/7coamf/query_no_user_exists_for/"
Add-Content -Path "$FilePath" -Value "## ref https://smsagent.blog/2022/03/03/user-context-detection-rules-for-intune-win32-apps/"
Add-Content -Path "$FilePath" -Value "`$header=@('SESSIONNAME', 'USERNAME', 'ID', 'STATE', 'TYPE', 'DEVICE')"
Add-Content -Path "$FilePath" -Value "`$Sessions = query session"
Add-Content -Path "$FilePath" -Value "[array]`$ActiveSessions = `$Sessions | Select -Skip 1 | Where {`$_ -match ""Active""}"
Add-Content -Path "$FilePath" -Value "If (`$ActiveSessions.Count -ge 1)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUsers = @()"
Add-Content -Path "$FilePath" -Value "`$indexes = `$header | ForEach-Object {(`$Sessions[0]).IndexOf("" `$_"")}"
Add-Content -Path "$FilePath" -Value "for(`$row=0; `$row -lt `$ActiveSessions.Count; `$row++)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$obj=New-Object psobject"
Add-Content -Path "$FilePath" -Value "for(`$i=0; `$i -lt `$header.Count; `$i++)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$begin=`$indexes[`$i]"
Add-Content -Path "$FilePath" -Value "`$end=if(`$i -lt `$header.Count-1) {`$indexes[`$i+1]} else {`$ActiveSessions[`$row].length}"
Add-Content -Path "$FilePath" -Value "`$obj | Add-Member NoteProperty `$header[`$i] (`$ActiveSessions[`$row].substring(`$begin, `$end-`$begin)).trim()"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUsers += `$obj"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUser = `$LoggedOnUsers[0]"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUserSID = Get-ItemProperty ""HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\SessionData\`$(`$LoggedOnUser.ID)"" -Name LoggedOnUserSID -ErrorAction SilentlyContinue |"
Add-Content -Path "$FilePath" -Value "Select -ExpandProperty LoggedOnUserSID"
Add-Content -Path "$FilePath" -Value "Return `$LoggedOnUserSID"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$LoggedOnUserSID = Get-LoggedOnUserSID"
Add-Content -Path "$FilePath" -Value "If (`$null -ne `$LoggedOnUserSID)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "If (`$null -eq (Get-PSDrive -Name HKU -ErrorAction SilentlyContinue))"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$null = New-PSDrive -PSProvider Registry -Name HKU -Root HKEY_USERS"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "`$i = Get-Item ""HKU:\`$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\$($LMStudio.PSChildName)"" -ErrorAction SilentlyContinue"
Add-Content -Path "$FilePath" -Value "if (`$null -eq `$i)"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## Key Does NOT Exist"
Add-Content -Path "$FilePath" -Value """Key Does NOT Exist"""
Add-Content -Path "$FilePath" -Value "Exit 1"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "else"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "`$r = Get-ItemProperty ""HKU:\`$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\$($LMStudio.PSChildName)"" -Name 'DisplayVersion' -ErrorAction SilentlyContinue |"
Add-Content -Path "$FilePath" -Value "Select -ExpandProperty 'DisplayVersion'"
Add-Content -Path "$FilePath" -Value "If (`$r -ge '$($LMStudio.DisplayVersion)')"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## Installed"
Add-Content -Path "$FilePath" -Value """Installed"""
Add-Content -Path "$FilePath" -Value "Exit 0"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "else"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## Correct App Version NOT Installed"
Add-Content -Path "$FilePath" -Value """Correct App Version NOT Installed"""
Add-Content -Path "$FilePath" -Value "Exit 1"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "}"
Add-Content -Path "$FilePath" -Value "Else"
Add-Content -Path "$FilePath" -Value "{"
Add-Content -Path "$FilePath" -Value "## No Logged on User Detected"
Add-Content -Path "$FilePath" -Value """No Logged on User Detected"""
Add-Content -Path "$FilePath" -Value "Exit 1"
Add-Content -Path "$FilePath" -Value "}"
Invoke-Item $FilePath
  • Click Run Script (F5)
  • A text file will open with the LM Studio Detection Method script required to detect the current version of LM Studio that is installed on the device you are running the script from.

Example:

Function Get-LoggedOnUserSID {
## ref https://www.reddit.com/r/PowerShell/comments/7coamf/query_no_user_exists_for/
## ref https://smsagent.blog/2022/03/03/user-context-detection-rules-for-intune-win32-apps/
$header=@('SESSIONNAME', 'USERNAME', 'ID', 'STATE', 'TYPE', 'DEVICE')
$Sessions = query session
[array]$ActiveSessions = $Sessions | Select -Skip 1 | Where {$_ -match "Active"}
If ($ActiveSessions.Count -ge 1)
{
$LoggedOnUsers = @()
$indexes = $header | ForEach-Object {($Sessions[0]).IndexOf(" $_")}
for($row=0; $row -lt $ActiveSessions.Count; $row++)
{
$obj=New-Object psobject
for($i=0; $i -lt $header.Count; $i++)
{
$begin=$indexes[$i]
$end=if($i -lt $header.Count-1) {$indexes[$i+1]} else {$ActiveSessions[$row].length}
$obj | Add-Member NoteProperty $header[$i] ($ActiveSessions[$row].substring($begin, $end-$begin)).trim()
}
$LoggedOnUsers += $obj
}
$LoggedOnUser = $LoggedOnUsers[0]
$LoggedOnUserSID = Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\SessionData\$($LoggedOnUser.ID)" -Name LoggedOnUserSID -ErrorAction SilentlyContinue |
Select -ExpandProperty LoggedOnUserSID
Return $LoggedOnUserSID
}
}
$LoggedOnUserSID = Get-LoggedOnUserSID
If ($null -ne $LoggedOnUserSID)
{
If ($null -eq (Get-PSDrive -Name HKU -ErrorAction SilentlyContinue))
{
$null = New-PSDrive -PSProvider Registry -Name HKU -Root HKEY_USERS
}
$i = Get-Item "HKU:\$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\LM-Studio" -ErrorAction SilentlyContinue
if ($null -eq $i)
{
## Key Does NOT Exist
"Key Does NOT Exist"
Exit 1
}
else
{
$r = Get-ItemProperty "HKU:\$LoggedOnUserSID\Software\Microsoft\Windows\CurrentVersion\Uninstall\LM-Studio" -Name 'DisplayVersion' -ErrorAction SilentlyContinue |
Select -ExpandProperty 'DisplayVersion'
If ($r -ge '0.2.12')
{
## Installed
"Installed"
Exit 0
}
else
{
## Correct App Version NOT Installed
"Correct App Version NOT Installed"
Exit 1
}
}
}
Else
{
## No Logged on User Detected
"No Logged on User Detected"
Exit 1
}

Always make sure to test everything in a development environment prior to implementing anything into production. The information in this article is provided “As Is” without warranty of any kind.

Jason Bergner

I am an accomplished Software Engineer at Patch My PC, leveraging more than 18 years of hands-on experience in Configuration Manager administration and application packaging. I am driven by a genuine passion for solving complex problems and consistently strive to discover innovative and effective solutions. Sharing my extensive knowledge of application deployments is a true joy for me, and I am honored to contribute to the community here at Silent Install HQ.

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