public static OrphanComponent IsOrphanComponent(RegistryKey componentKey)
{
string[] productCodes = componentKey.GetValueNames();
string compName = Path.GetFileName(componentKey.Name);
OrphanComponent orphan = new OrphanComponent(compName);
foreach (string p in productCodes)
{
// Ignore default value
if (string.IsNullOrWhiteSpace(p) || p.Equals("@") || p.Equals("00000000000000000000000000000000"))
{
continue;
}
Guid productCode = p.MsiObfuscate();
Guid componentGuid = compName.MsiObfuscate();
IEnumerable <ProductInstallation> pis = ProductInstallation.GetProducts(productCode.ToString("B"), null, UserContexts.All);
if ((pis == null) || (pis.Count() <= 0))
{
string keyPath = componentKey.GetValue(p) as string;
Console.WriteLine($"Component '{componentGuid.ToString("B")}' in registry key '{componentKey.Name}' is registered to product '{productCode.ToString("B")} which is not installed with KeyPath='{keyPath}'");
orphan.NonExistingClients.Add(productCode.ToString("B"));
}
}
return(orphan.NonExistingClients.Count > 0 ? orphan : null);
}
public static List <OrphanComponent> DetectOrphanComponents()
{
List <OrphanComponent> orphans = new List <OrphanComponent>();
using (RegistryKey hklm = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64))
{
using (RegistryKey k = hklm.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Components", false))
{
if (k == null)
{
Console.WriteLine(@"Registry key doesn't exist: SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Components");
return(null);
}
string[] componentCodes = k.GetSubKeyNames();
foreach (string c in componentCodes)
{
// Ignore default value
if (string.IsNullOrWhiteSpace(c) || c.Equals("@"))
{
continue;
}
using (RegistryKey k2 = k.OpenSubKey(c))
{
OrphanComponent orphan = OrphanComponent.IsOrphanComponent(k2);
if (orphan != null)
{
orphans.Add(orphan);
}
}
}
}
}
return(orphans);
}
static void Main(string[] args)
{
OrphanComponent.DetectOrphanComponents();
}