QoS Packet Scheduler - Windows 11 Service
QoS Packet Scheduler.
This service also exists in Windows 10, 7, 8, Vista and XP.
Startup Type
| Windows 11 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 21H2 | System | System | System | System |
| 22H2 | System | System | System | System |
| 23H2 | System | System | System | System |
| 24H2 | System | System | System | System |
Default Properties
| Display name: | QoS Packet Scheduler |
| Service name: | Psched |
| Type: | kernel |
| Path: | %WinDir%\System32\drivers\pacer.sys |
| Error control: | normal |
| Group: | NDIS |
Default Behavior
The QoS Packet Scheduler service is a kernel mode driver. If QoS Packet Scheduler fails to start, the error is logged. Windows 11 startup proceeds, but a message box is displayed informing you that the Psched service has failed to start.
Dependencies
If QoS Packet Scheduler is stopped, the Quality Windows Audio Video Experience service fails to start and initialize.
Restore Default Startup Type for QoS Packet Scheduler
Automated Restore
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreQoSPacketSchedulerWindows11.bat file to any folder on a local drive such as SSD or a hard disk.
3. Right-click the downloaded batch file and select Properties.
4. Check the Unblock checkbox and click OK.
5. Right-click the batch file again and select Run as administrator.
6. Restart the computer to save changes.
Note. Make sure that the pacer.sys file exists in the %WinDir%\System32\drivers folder. If this file is missing you can try to restore it from your Windows 11 installation media.