Autoenrollment with event id 15

最近学校的网络好像不太稳定，前几天不知道什么原因甚至瘫痪了一晚上。我的日志里也有一些

Event Type: Error
Event Source: AutoEnrollment
Event Category: None
Event ID: 15
Date: date
Time: time
User: N/A
Computer: computer name
Description: Automatic certificate enrollment for local system failed to contact the active directory (0x8007054b). The specified domain either does not exist or could not be contacted. Enrollment will not be performed.

微软的这篇文章描述了这个问题，我想应该与学校的DNS server有关系。

CAUSE

This problem may occur if the Autoenrollment feature cannot reach an Active Directory domain controller. In a Microsoft Windows NT 4.0 domain, Active Directory is not available. Therefore, the Autoenrollment feature cannot work. In an Active Directory domain that has Microsoft Windows 2000 or later domain controllers, the problem may be caused by a DNS name resolution or by network connectivity issue.