Win10 更新补丁后出现“未安装音频设备” 错误 2021-10-14

日前更新win10补丁后，右下角音频图标出现红色叉叉，提示”未安装音频设备“，卸载驱动等方式均无效，百度了半天后找到如下2种方法

方法一：找到cmd命令行，右键以管理员身份运行，执行如下2条命令后重启

net localgroup Administrators /add networkservice

net localgroup Administrators /add localservice

原理是将networkservice、localservice两个用户加入administrator用户组，音频驱动运行需要相应权限。虽然可正常使用，但随意提升账户权限容易有安全风险。

方法二(建议使用)：修复注册表 HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\ConsoleSecurity ，该项如为全零，则不正常，可从其余正常电脑重新导入该项数值，或使用以下注册表数值直接导入后重启

具体：将以下代码复制到txt文档中，随后将文档后缀名从.txt修改为.reg，双击执行并重启

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations]
"ConsoleSecurity"=hex:01,00,14,80,9c,00,00,00,a8,00,00,00,00,00,00,00,14,00,00,\
  00,02,00,88,00,06,00,00,00,00,00,14,00,01,00,00,00,01,01,00,00,00,00,00,05,\
  04,00,00,00,00,00,14,00,bf,03,0f,00,01,01,00,00,00,00,00,05,12,00,00,00,00,\
  00,14,00,89,00,0f,00,01,01,00,00,00,00,00,05,13,00,00,00,00,00,14,00,81,00,\
  00,00,01,01,00,00,00,00,00,05,14,00,00,00,00,00,18,00,bf,03,0f,00,01,02,00,\
  00,00,00,00,05,20,00,00,00,20,02,00,00,00,00,18,00,21,01,00,00,01,02,00,00,\
  00,00,00,05,20,00,00,00,2b,02,00,00,01,01,00,00,00,00,00,05,12,00,00,00,01,\
  01,00,00,00,00,00,05,12,00,00,00

感谢国外大神：方法来源