public static List <RemoteUpdate> GetInstalledUpdates()
{
// Use WMI to retrieve a list of installed Microsoft updates.
var updates = new List <RemoteUpdate>();
var taskResult = new TaskResult();
Result = taskResult;
const string microsoftKbUrl = "http://support.microsoft.com/?kbid=";
// Setup WMI query.
var options = new ConnectionOptions();
if (GlobalVar.UseAlternateCredentials)
{
options.Username = GlobalVar.AlternateUsername;
options.Password = GlobalVar.AlternatePassword;
options.Authority = $"NTLMDOMAIN:{GlobalVar.AlternateDomain}";
}
var scope = new ManagementScope($@"\\{ComputerName}\root\CIMV2", options);
var query = new ObjectQuery("SELECT HotFixID,InstalledOn FROM Win32_QuickFixEngineering WHERE HotFixID <> 'File 1'");
var searcher = new ManagementObjectSearcher(scope, query);
try
{
foreach (ManagementObject m in searcher.Get())
{
var update = new RemoteUpdate();
update.UpdateId = (m["HotFixID"] != null) ? m["HotFixID"].ToString() : string.Empty;
if (m["InstalledOn"] != null)
{
DateTime installDate;
if (DateTime.TryParse(m["InstalledOn"].ToString(), out installDate))
{
update.InstallDate = installDate;
}
}
update.ExternalLink = (ExtractKbNumber(update.UpdateId).Length > 0) ? microsoftKbUrl + ExtractKbNumber(update.UpdateId) : string.Empty;
if (update.UpdateId.Length > 0)
{
updates.Add(update);
}
}
taskResult.DidTaskSucceed = true;
}
catch
{
taskResult.DidTaskSucceed = false;
}
return(updates);
}
public static DialogResult UninstallUpdate(RemoteUpdate update)
{
// UninstallUpdate() uses WMI to execute the Microsoft update uninstaller.
// It returns a DialogResult which will be used to display the results.
var dialog = new DialogResult();
bool didTaskSucceed = false;
string commandLine = $"wusa /uninstall /kb:{ExtractKbNumber(update.UpdateId)} /quiet /norestart";
// Setup WMI query.
var options = new ConnectionOptions();
if (GlobalVar.UseAlternateCredentials)
{
options.Username = GlobalVar.AlternateUsername;
options.Password = GlobalVar.AlternatePassword;
options.Authority = $"NTLMDOMAIN:{GlobalVar.AlternateDomain}";
}
var scope = new ManagementScope($@"\\{ComputerName}\root\CIMV2", options);
// Connect to WMI and invoke the process creation method.
try
{
scope.Connect();
var objectGetOptions = new ObjectGetOptions();
var managementPath = new ManagementPath("Win32_Process");
var managementClass = new ManagementClass(scope, managementPath, objectGetOptions);
ManagementBaseObject inParams = managementClass.GetMethodParameters("Create");
inParams["CommandLine"] = commandLine;
ManagementBaseObject outParams = managementClass.InvokeMethod("Create", inParams, null);
int returnValue;
bool isReturnValid = int.TryParse(outParams["ReturnValue"].ToString(), out returnValue);
if (!isReturnValid || returnValue != 0)
{
throw new Exception();
}
didTaskSucceed = true;
}
catch
{ }
if (didTaskSucceed)
{
// Process terminated. Build DialogResult to reflect success.
dialog.DialogTitle = "Success";
dialog.DialogBody = $"The target computer is processing the request to uninstall Microsoft update {update.UpdateId}." +
$"{Environment.NewLine}{Environment.NewLine}" +
"It might take several minutes to complete the uninstallation and the computer might need to be rebooted when finished.";
dialog.DialogIconPath = "/Resources/success-48.png";
dialog.ButtonIconPath = "/Resources/checkmark-24.png";
dialog.ButtonText = "OK";
dialog.IsCancelVisible = false;
}
else
{
// Error terminating process. Build DialogResult to reflect failure.
dialog.DialogTitle = "Error";
dialog.DialogBody = $"Failed to uninstall Microsoft update {update.UpdateId}.";
dialog.DialogIconPath = "/Resources/error-48.png";
dialog.ButtonIconPath = "/Resources/checkmark-24.png";
dialog.ButtonText = "OK";
dialog.IsCancelVisible = false;
}
return(dialog);
}
