Quality Windows Audio Video Experience - Windows Vista Service
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.
This service also exists in Windows 10, 11, 7 and 8.
Startup Type
| Windows Vista edition | without SP | SP1 | SP2 |
|---|---|---|---|
| Starter | Manual | Manual | Manual |
| Home Basic | Manual | Manual | Manual |
| Home Premium | Manual | Manual | Manual |
| Business | Manual | Manual | Manual |
| Ultimate | Manual | Manual | Manual |
Default Properties
| Display name: | Quality Windows Audio Video Experience |
| Service name: | QWAVE |
| Type: | share |
| Path: | %WinDir%\system32\svchost.exe -k LocalService |
| File: | %windir%\system32\qwave.dll |
| Error control: | normal |
| Object: | NT AUTHORITY\LocalService |
| Privileges: |
|
Default Behavior
The Quality Windows Audio Video Experience service starts as NT AUTHORITY\LocalService and runs in a shared process of svchost.exe. If Quality Windows Audio Video Experience fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the QWAVE service has failed to start.
Dependencies
The Quality Windows Audio Video Experience service won't start, if the following system components are stopped or disabled:
- Link-Layer Topology Discovery Mapper I/O Driver
- QoS Packet Scheduler
- QWAVE driver
- Remote Procedure Call (RPC)
Restore Default Startup Type of Quality Windows Audio Video Experience
Automated Restore
1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.
2. Save the RestoreQualityWindowsAudioVideoExperienceWindowsVista.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the qwave.dll file exists in the %windir%\system32 folder. If this file is missing you can try to restore it from your Windows Vista installation media.