Настройка Windows Service – доступ к рабочему столу

[RunInstaller(true)]
public partial class ProjectInstaller : System.Configuration.Install.Installer
{
    public ProjectInstaller()
    {
        this.InitializeComponent();
    }

    protected override void OnCommitted(IDictionary savedState)
    {
        base.OnCommitted(savedState);

        using (RegistryKey ckey = Registry.LocalMachine.OpenSubKey(string.Format(@"SYSTEM\CurrentControlSet\Services\{0}", "YOURSERVICENAME"), true))
        {
            if (ckey != null && ckey.GetValue("Type") != null)
            {
                ckey.SetValue("Type", (((int)ckey.GetValue("Type")) | 256));
            }
        }
    }
}