List Installed Windows Programs

Get-InstalledProgramList.ps1

function AnalyzeReg($p, $f) {
    Get-ItemProperty $p | ForEach-Object {
        if (($_.DisplayName) -or ($_.version)) {
            [PSCustomObject]@{
                Name = $_.DisplayName;
                Bitness = $f;
                Version = $_.DisplayVersion;
                InstallDate = $_.InstallDate
            }
        }
    }
}

function AnalyzeAppx() {
    Get-AppxPackage | ForEach-Object {
        if (($_.InstallLocation) -match "C:\\Program Files\\WindowsApps") {
            [PSCustomObject]@{
                Name = $_.Name;
                Bitness = "MSFT Store";
                Version = $_.Version;
                InstallDate = "MSFT Store"
            }
        }
    }
}

$s = @()
$s += AnalyzeReg 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' "64-bit"
# Note: HKCU holds both 32- and 64-bit MSI's here, so the script can't tell the bitness
$s += AnalyzeReg 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' "Unknown"
$s += AnalyzeReg 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*' "32-bit"
$s += AnalyzeAppx

$s | Sort-Object -Property Name | Export-csv .\InstalledApps.csv -NoTypeInformation
Write-Host $s.count "programs detected. Output in $pwd\InstalledApps.csv"
Write-Host "Done"