操作方法
打开命令提示符（管理员）
输入netsh winhttp reset proxy
然后输入net stop WuAuServ
再输入net start WuAuServ
原理：CSDN知识库的说法是：1、查看$windows/windowsupdata.log文件，日志中有如下记录：Send failed with hr = 80072ee7.SendRequest failed with hr = 80072ee7. Proxy List used: <(null)> Bypass List used : <(null)>GetConfig: 0x8024402cPT: Cannot recover from fault, origin=GetConfig, hr=0x8024402cSync of Updates: 0x8024402cWU client failed Searching for update with error 0x8024402cWU client calls back to search call WindowsUpdate with code Call failed and error 0x8024402c 2、运行proxycfgCurrent WinHTTP proxy settings underHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\WinHttpSettings :Flags = PROXY_TYPE_DIRECTProxy Server = -not set-Bypass List = -not set-3、运行proxycfg -u，而后在Proxy Server及Bypass List设置上均会有值4、运行net stop wuauserv，后运行net start wuauserv5、问题解决