$cs.MSI_IsMSIGuidInstalled

Description

Checks whether a product with the given ProductCode GUID is currently installed, by querying Windows Installer’s product state directly — no MSI file needed, just the GUID. Windows-only.

Syntax

$cs.MSI_IsMSIGuidInstalled(string msiguid)

Parameters

msiguid (String)

ProductCode GUID to check the installation status of.

Return value

Boolean, $true if a product with this GUID is installed. Returns $false on any error rather than throwing.

Example

PowerShell

if ($cs.MSI_IsMSIGuidInstalled('{AC76BA86-1033-FF00-7760-BC15014EA700}')) {
  $cs.Job_WriteLog("Product is already installed, skipping install")
}

Use the same guard with a hardcoded GUID inside PreInstall, which is useful when the kit downloads its MSI separately at install time rather than shipping it in the package:

function PreInstall {
  $cs.Log_SectionHeader('PreInstall', 'o')
  $knownProductCode = '{AC76BA86-1033-FF00-7760-BC15014EA700}'
  if ($cs.MSI_IsMSIGuidInstalled($knownProductCode)) {
    Exit-PSScript -exitcode 3330 -exitmessage "$global:AppName ($knownProductCode) is already installed, nothing to do"
  }
}

$cs.MSI_GetProductCodeFromMSI $cs.MSI_IsMSIFileInstalled