Quality Windows Audio Video Experience (QWAVE) Service Defaults in Windows 7

Quality Windows Audio Video Experience (qWave) is a networking platform for Audio Video (AV) streaming applications on IP home networks. qWave enhances AV streaming performance and reliability by ensuring network quality-of-service (QoS) for AV applications. It provides mechanisms for admission control, run time monitoring and enforcement, application feedback, and traffic prioritization.

Default Settings

Startup type:Manual
Display name:Quality Windows Audio Video Experience
Service name:QWAVE
Service type:share
Error control:normal
Object:NT AUTHORITY\LocalService
Path:%SystemRoot%\system32\svchost.exe -k LocalServiceAndNoImpersonation
File:%SystemRoot%\system32\qwave.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\QWAVE
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Default Behavior

Quality Windows Audio Video Experience is a Win32 service. In Windows 7 it won't be started if the user doesn't start it. When the Quality Windows Audio Video Experience service is started, it is running as NT AUTHORITY\LocalService in a shared process of svchost.exe. Other system components, such as drivers and services, may run in the same process. If Quality Windows Audio Video Experience fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the QWAVE service is not running because of the error.

Dependencies

Quality Windows Audio Video Experience is unable to start, if at least one of the following services is stopped or disabled:

Restore Default Startup Configuration for Quality Windows Audio Video Experience

Before you begin doing this, make sure that all the services on which Quality Windows Audio Video Experience depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config QWAVE start= demand

3. Close the command window and restart the computer.

The QWAVE service is using the qwave.dll file that is located in the %windir%\system32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.