当win7电脑遇到一些错误或者需要删除一些顽固病毒文件时，可以通过安全模式解决。但是有些用户发现安全模式下没有声音，默认的声音图标是禁用声音。我该怎么办？为了解决这个问题，
下面我们来看看如何开启没有声音的安全模式。
具体方法如下：
1.默认情况下，安全模式禁用声音；
Services such as: 
2, windows Audio and windows Audio Endpoint Version are disabled;
: 
3.将以下内容保存为. reg文件运行，双击运行。
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/{4D36E96C-E325-11CE-BFC1-08002BE10318}]
!]'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/{640167b4-59b0-47a6-b335-a6b3c0695aea}]
@='Portable Media Devices'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/AudioEndpointBuilder]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/Audiosrv]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/HdAudAddService]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/HDAudBus]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/drmkaud]
@='Driver'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Network/MMCSS]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/{4D36E96C-E325-11CE-BFC1-08002BE10318}]
!]'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/{640167b4-59b0-47a6-b335-a6b3c0695aea}]
@='Portable Media Devices'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/AudioEndpointBuilder]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/Audiosrv]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/HdAudAddService]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/HDAudBus]
@='Service'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/drmkaud]
@='Driver'
[HKEY_LOCAL_MACHINE/SYSTEM/ControlSet001/Control/SafeBoot/Minimal/MMCSS]
@='Service'
4.点按右下角的声音图标，然后点按“修复”来聆听声音。
以上教程内容是win7安全模式的静默打开方法。