GetSystemSoftware.psm1

Function Get-SystemSoftware{
    <#
    .SYNOPSIS
    Gather software installed on a local or remote device
    .DESCRIPTION
    The script will display Software ID number, Name, Publisher and Version.
    .PARAMETER Computer
    With this parameter you cam run this on a remote computer
    .PARAMETER QueryType
    Specify how you want to gather the information
    WMI - gather installed software on a remote device but the list may be missing some hidden software
    Registry - Will not work on a remote device but shows a more indepth list
    .NOTES
    Contact: contact@mosaicmk.com
    Version: 3.1.1
    .LINK
    https://www.mosaicmk.com
    #>

    param(
        [string]$ComputerName = $env:computername,
        [Parameter(Mandatory=$true)]
        [ValidateSet('Registry','WMI')]
        [string]$QueryType
    )
    IF (($ComputerName -ne $env:computername) -and ($QueryType -eq "Registry")) {Write-Error "Registy Query Type wil only query the local device";return}
    IF ($QueryType -eq "Registry"){
        $ComputerSoftware = @()
        $uniReg = Get-ChildItem -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\"
        Set-Location HKLM: | Out-Null
        foreach ($item in $uniReg){
            $I = Get-ItemProperty $item
            if ($I.DisplayName){
                $Name = $I.DisplayName
                $Version = $I.DisplayVersion
                $Publisher = $I.Publisher
                $UninstallString = $I.UninstallString
                $ComputerSoftware += [pscustomobject]@{
                    Name = $Name
                    Version = $Version
                    Publisher = $Publisher
                    UninstallString = $UninstallString
                }
            }
        }
        $uniReg = Get-ChildItem -Path "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
        foreach ($item in $uniReg){
            $I = Get-ItemProperty $item
            if ($I.DisplayName){
                $Name = $I.DisplayName
                $Version = $I.DisplayVersion
                $Publisher = $I.Publisher
                $UninstallString = $I.UninstallString
                $ComputerSoftware += [pscustomobject]@{
                    Name = $Name
                    Version = $Version
                    Publisher = $Publisher
                    UninstallString = $UninstallString
                }
            }
        }
        Set-Location $PSScriptRoot
        $ComputerSoftware
    }
    IF ($QueryType -eq "WMI"){
        $SFInfo = Get-WmiObject Win32_Product -ComputerName $ComputerName
        $AllObjects = @()
        foreach ($item in $SFInfo){
            $Name = $item.Name
            $ID = $item.IdentifyingNumber
            $Vendor = $item.Vendor
            $Version = $item.Version
            $AllObjects += [pscustomobject]@{
                Name = $name
                ID = $ID
                Publisher = $Vendor
                Version = $Version
            }
        }
        $AllObjects
    }
}