以前在遇到安装正确的声卡驱动以后，在控制面板的声音和音频设置依然显示灰色问题，这种现象有可能是windows audio服务丢失，或者此服务被禁用没有启动。但更多种可能就是，声卡驱动安装不正确，下文仅提示如果windows audio服务丢失的解决方法。

如果查找是windows audio服务丢失，判断是否为windows audio服务引起上述声卡不能用问题的方法是在控制面板－管理工具－服务中查找是否有windows audio服务并查看是否已自动启动？

解决方法如下：

1、将下面的文件复制到文本文件中，保存后改名为Audio.reg

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AudioSrv]
"DependOnService"=hex(7):50,00,6c,00,75,00,67,00,50,00,6c,00,61,00,79,00,00,00,\
52,00,70,00,63,00,53,00,73,00,00,00,00,00
"Description"="管理基于 Windows 的程序的音频设备。如果此服务被终止，音频设备及其音效将不能正常工作。如果此服务被禁用，任何依赖它的服务将无法启动。"
"DisplayName"="Windows Audio"
"ErrorControl"=dword:00000001
"Group"="AudioGroup"
"ImagePath"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\
00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,\
6b,00,20,00,6e,00,65,00,74,00,73,00,76,00,63,00,73,00,00,00
"ObjectName"="LocalSystem"
"Start"=dword:00000002
"Type"=dword:00000020
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AudioSrv\Parameters]
"ServiceDll"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,\
00,74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,\
61,00,75,00,64,00,69,00,6f,00,73,00,72,00,76,00,2e,00,64,00,6c,00,6c,00,00,\
00
"ServiceDllUnloadOnStop"=dword:00000001
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AudioSrv\Enum]
"0"="Root\\LEGACY_AUDIOSRV\\0000"
"Count"=dword:00000001
"NextInstance"=dword:00000001

2、双击刚刚创建并保存的audio.reg文件，并重启机器就OK了。