Check if a Software Program Is Installed using PowerShell Script

Check if a Software is installed by using WMI query

The below function checks the application is installed or not by using Powershell’s WMI Class Win32_Product.

function Check_Program_Installed( $programName ) {
$wmi_check = (Get-WMIObject -Query "SELECT * FROM Win32_Product Where Name Like '%$programName%'").Length -gt 0
return $wmi_check;
}

Check_Program_Installed("Microsoft SQL")

Check if a Program is installed or not by checking registry value

The below PowerShell function check the Uninstall location and returns true if a given program is installed and returns false if not installed.

function Check_Program_Installed( $programName ) {
$x86_check = ((Get-ChildItem "HKLM:Software\Microsoft\Windows\CurrentVersion\Uninstall") |
Where-Object { $_."Name" -like "*$programName*" } ).Length -gt 0;
 
if(Test-Path 'HKLM:Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall')  
{
$x64_check = ((Get-ChildItem "HKLM:Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall") |
Where-Object { $_."Name" -like "*$programName*" } ).Length -gt 0;
}
return $x86_check -or $x64_check;
}
 
Check_Program_Installed("Microsoft")

This above script checks both the regular Uninstall location as well as the”Wow6432Node” location to ensure that both 32-bit and 64-bit locations are checked for software installations.

Check if a Software is installed in Remote Machine

The below function checks if the given software program is installed or not in remote computer.

function Check_Program_Installed($computer, $programName ) {
$wmi_check = (Get-WMIObject -ComputerName $computer -Query "SELECT * FROM Win32_Product Where Name Like '%$programName%'").Length -gt 0
return $wmi_check;
}

Check_Program_Installed("hp-pc","Microsoft SQL")

Export list of Installed Software Programs into CSV file

You can export the installed software application details to CSV using Powershell’s Export-CSV cmdlet. The following script exports the Non-Microsoft applications to CSV file.

Get-WMIObject -Query "SELECT * FROM Win32_Product Where Not Vendor Like '%Microsoft%'" |
Select-Object Name,Version,Vendor,InstallLocation,InstallDate |
Export-CSV 'C:\Non_MS_Products.csv'