check_installed_duplicate_program.ps1

# Check if running with Administrator privileges
if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Write-Error "This script requires Administrator privileges to ensure the uninstall is silent. Please run it as an administrator."
    exit 1
}

$displayName = "Foxit PDF Reader"
$processName = "FoxitPDFReader"

function Get-UninstallEntries {
    $regPath1 = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"
    $regPath2 = "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
    $regPath3 = "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"
    @(Get-ChildItem $regPath1, $regPath2, $regPath3 -ErrorAction SilentlyContinue |
        ForEach-Object { try { Get-ItemProperty -Path $_.PsPath -ErrorAction Stop } catch {} } |
        Where-Object { $_.DisplayName -match $displayName }
    )
}

# Check if the program is running
if (Get-Process -Name $processName -ErrorAction SilentlyContinue) {
    Write-Warning "$displayName is currently running."
}
else {
    Write-Host "$displayName is not currently running."
}


# Check if there is a duplicate installation
$entryCount = (Get-UninstallEntries).Count
if ($entryCount -gt 1) {
    Write-Warning "$entryCount duplicate installations found for $displayName."
    exit 1
}
else {
    Write-Host "No duplicate installation found for $displayName. Exiting..."
    exit 0
}