QoS Packet Scheduler - Windows 7 Service
QoS Packet Scheduler.
This service also exists in Windows 10, 11, 8, Vista and XP.
Startup Type
| Windows 7 edition | without SP | SP1 |
|---|---|---|
| Starter | System | System |
| Home Basic | System | System |
| Home Premium | System | System |
| Professional | System | System |
| Ultimate | System | System |
| Enterprise | 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 driver. If the QoS Packet Scheduler fails to load or initialize, the error is recorded into the Event Log. Windows 7 startup should proceed, but a message box is displayed informing you that the Psched service has failed to start.
Dependencies
If the QoS Packet Scheduler is stopped, the Quality Windows Audio Video Experience fails to start and initialize.
Restore Default Startup Type of QoS Packet Scheduler
Automated Restore
1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.
2. Save the RestoreQoSPacketSchedulerWindows7.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 pacer.sys file exists in the %WinDir%\system32\DRIVERS folder. If this file is missing you can try to restore it from your Windows 7 installation media.