Get's a list of installed software on a system

Get-InstalledSoftware.ps1

Param(
	[Parameter(Mandatory=$true)]
	$FilePath
)

$computername=$env:COMPUTERNAME

$uninstallKey = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall"

$reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey('LocalMachine', $computername)

$regkey = $reg.OpenSubKey($uninstallKey)

$subkeys = $regkey.GetSubKeyNames()

$output = @()

$filterList = @(
	'Windows Server'
	,'Citrix Hotfix'
	,'Security Update for Microsoft'
	,'Hotfix for Microsoft'
	,'Security Update for Windows'
	,'Update for '
)

foreach ($key in $subkeys)
{
	$cntKey = $uninstallKey+"\\"+$key
	$cntSubKey = $reg.OpenSubKey($cntKey)
	$displayName = $cntSubKey.GetValue("DisplayName")
	
	if ($displayName -ieq $null) { continue }
	
	$compliance = $true
	
	foreach ($subStr in $filterList)
	{
		if ($displayName.ToLower().Contains($subStr.ToLower())) 
		{
			Write-Host "Filtering entry " + $displayName
			$compliance = $false
		}
	}
	
	if ($compliance -ieq $true)
	{
		$o = New-Object PSObject
	
		$o | Add-Member -MemberType NoteProperty `
					-Name "ComputerName" `
					-Value $computername
					
		$o | Add-Member -MemberType NoteProperty `
					-Name "Software" `
					-Value $displayName
					
		$output += $o
	}

}

$output | Export-Csv -Path $FilePath