我相信这个问题更适合 superuser.com，但可能它属于 serverfault.com。
我有一台运行 Windows Server 2008 R2 的系统，其 IPv4 TCP 设置设为静态 IP 地址。昨晚，它突然失去网络连接，经检查，所有设置都被清除了（IP 地址、子网和网关）。
我是唯一一个对该机器具有管理员访问权限的人，并且最近几天我并没有访问过它。
显然，病毒总是一种下意识的可能性，但我确信系统是干净的。有没有人知道这怎么可能发生？或者至少，我可以在哪里找到更多线索来解释这个问题？
EventLog 中的一些详细信息：
晚上 10:27:55：
Installation Ready: The following updates are downloaded and ready for installation. This computer is currently scheduled to install these updates on Thursday, August 11, 2011 at 3:00 AM:
- Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2539636)
- Cumulative Security Update for Internet Explorer 8 for Windows Server 2008 R2 x64 Edition (KB2559049)
- Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2487367)
- Security Update for Windows Server 2008 R2 x64 Edition (KB2567680)
- Security Update for Windows Server 2008 R2 x64 Edition (KB2563894)
- Security Update for Windows Server 2008 R2 x64 Edition (KB2536276)
- Update Rollup for ActiveX Killbits for Windows Server 2008 R2 x64 Edition (KB2562937)
- Windows Malicious Software Removal Tool x64 - August 2011 (KB890830)
- Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2 SP1 for x64-based Systems (KB2539635)
- Security Update f
凌晨 3:02:44
安装成功：Windows 成功安装了以下更新：适用于基于 x64 系统的 Windows XP、Windows Server 2003、Windows Vista、Windows 7、Windows Server 2008、Windows Server 2008 R2 上的 Microsoft .NET Framework 4 安全更新 (KB2539636)
凌晨 3:06:54
Restart Required: To complete the installation of the following updates, the computer will be restarted within 15 minutes:
- Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2539636)
- Cumulative Security Update for Internet Explorer 8 for Windows Server 2008 R2 x64 Edition (KB2559049)
- Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2487367)
- Security Update for Windows Server 2008 R2 x64 Edition (KB2567680)
- Security Update for Windows Server 2008 R2 x64 Edition (KB2563894)
- Security Update for Windows Server 2008 R2 x64 Edition (KB2536276)
- Update Rollup for ActiveX Killbits for Windows Server 2008 R2 x64 Edition (KB2562937)
- Windows Malicious Software Removal Tool x64 - August 2011 (KB890830)
- Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2 SP1 for x64-based Systems (KB2539635)
- Security Update f
最后在凌晨 3:24:44：
Broadcom BCM5709C：网络链路断开。请检查网络电缆是否连接正确。
因此，Windows 自动更新似乎在这次故障中扮演了一定角色。我不认为问题仅仅是由重启引起的，因为在修复 IP 地址等之后，后续重启并没有解决问题。