C# 为什么安装Windows服务时会记录系统错误7030？

每次在运行Windows 7或Windows Server 2008 R2的系统上安装“我的Windows服务”（在Visual Studio 2010的C#中开发）时，都会记录系统错误7030。该服务未配置为交互式。我创建的自定义子类将帐户类型设置为NetworkService：

private System.ServiceProcess.ServiceProcessInstaller _serviceProcessInstaller;
private System.ServiceProcess.ServiceInstaller _serviceInstaller;

public ProjectInstaller()
{
    InitializeComponent();
}

private void InitializeComponent()
{
    _serviceProcessInstaller = new System.ServiceProcess.ServiceProcessInstaller();
    _serviceInstaller = new System.ServiceProcess.ServiceInstaller();
    _serviceProcessInstaller.Account = System.ServiceProcess.ServiceAccount.NetworkService;
    _serviceProcessInstaller.Password = null;
    _serviceProcessInstaller.Username = null;

    _serviceInstaller.ServiceName = Resources.ServiceName;
    _serviceInstaller.Description = Resources.ServiceDescription;
    _serviceInstaller.StartType = System.ServiceProcess.ServiceStartMode.Automatic;

    Installers.AddRange(new Installer[]
                            {
                               _serviceProcessInstaller,
                               _serviceInstaller
                            });
}

我还尝试将帐户类型设置为LocalSystem，但在本例中也记录了错误7030

在同一安装程序子类中，我还尝试根据以下内容取消设置注册表项：

//
///Override OnCommitted（）将Interactive的值覆盖为false。
/// 
/// 
///看https://stackoverflow.com/questions/1945529/how-can-i-configure-my-windows-service-in-the-code-to-access-the-desktop
/// 
/// 
已提交受保护的覆盖无效（System.Collections.IDictionary savedState）
{
const string pathToKey=@“SYSTEM\CurrentControlSet\services\MyService.exe”；
常量字符串type=“type”；
使用（var registryKey=Registry.LocalMachine.OpenSubKey（pathToKey，true））
{
if（registryKey！=null&®istryKey.GetValue（类型）！=null）
{
SetValue（类型，（（int）registryKey.GetValue（类型）&~0x100））；
}
}
基础。未提交（保存状态）；
}

这两次修复尝试都没有成功。因此，我也看了以下内容：和

    /// <summary>
    /// Override OnCommitted() to overwrite the value of Interactive to be false.
    /// </summary>
    /// <remarks>
    /// See https://stackoverflow.com/questions/1945529/how-can-i-configure-my-windows-service-in-the-code-to-access-the-desktop
    /// </remarks>
    /// <param name="savedState"></param>
    protected override void OnCommitted(System.Collections.IDictionary savedState)
    {
        const string pathToKey = @"SYSTEM\CurrentControlSet\services\MyService.exe";
        const string type = "Type";

        using (var registryKey = Registry.LocalMachine.OpenSubKey(pathToKey, true))
        {
            if (registryKey != null && registryKey.GetValue(type) != null)
            {
                registryKey.SetValue(type, (((int)registryKey.GetValue(type) & ~0x100)));
            }
        }

        base.OnCommitted(savedState);
    }