DNS电脑服务器发生故障可能会导致网络连接问题、网页无法访问、或者电子邮件无法发送等情况。修复DNS电脑服务器故障可以采取多种方法，例如检查网络连接、更换DNS服务器等措施。当DNS电脑服务器发生故障时，可以采取以下修复措施：
尝试刷新DNS缓存。刷新DNS缓存是一种快速解决DNS服务器故障的方法。在Windows系统中，可以打开命令提示符，输入“ipconfig /flushdns”命令，以清除错误的DNS条目并更新为最新版本;在macOS系统中，可以打开Terminal，输入“sudo dscacheutil -flushcache”和“sudo killall -HUP mDNSResponder”命令，以清除DNS缓存。
设置电脑DNS。当电脑遇到DNS故障时，可以尝试手动设置其他DNS解析服务。在电脑桌面右下角的网络图标上鼠标右键，然后点击打开“网络和共享中心”，再点击左侧的“更改适配器设置”。接下来在当前的联网网络连接名称上，右击鼠标，选择“属性”，最后在网络连接属性窗口中选中“Internet协议版本 4 (TCP/IPv4)/属性”，之后就可以设置DNS了。
检查网络连接。如果电脑无法连接到网络，首先要检查网络连接是否正常。可以尝试重新启动路由器、交换机或防火墙等设备，或者检查网络线缆是否有松动或破损。
检查DNS服务器设置。如果DNS服务器设置不正确，可能导致DNS故障。可以检查DNS服务器的配置文件，确保其正确地指向了正确的IP地址和端口号。
更新操作系统和应用程序。操作系统和应用程序的更新可能包含对DNS解析的修复和改进。要定期检查并安装更新，以确保系统的稳定性和安全性。
寻求专业帮助。如果以上方法都无法解决DNS电脑服务器故障，可以联系网络管理员或技术支持团队进行进一步的排查和修复。
当DNS电脑服务器发生故障时，要及时采取有效措施进行修复，以确保电脑和网络的正常运行。如果是网络连接问题，可以检查网络设备的连接情况;如果是DNS设置问题，可以手动设置DNS解析服务;如果是DNS缓存问题，可以尝试刷新DNS缓存;如果是操作系统或应用程序的问题，可以更新操作系统和应用程序;如果是其他问题，可以寻求专业帮助进行修复。
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