$applicationDisplayName = "Your Application Name"  # Replace with the name of the application you want to check

$regPath = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*"
$installedApps = Get-ItemProperty -Path $regPath | Where-Object { $_.DisplayName -eq $applicationDisplayName }

if ($installedApps) {
    Write-Host "$applicationDisplayName is installed."
}
else {
    Write-Host "$applicationDisplayName is not installed."
}