Windows 8 Services

QoS Packet Scheduler - Windows 8 Service

QoS Packet Scheduler.

This service also exists in Windows 10, 7, Vista and XP.

Startup Type

Windows 8 edition Windows 8 Windows 8.1 Windows 8.1 Update 1
Core System System System
Pro System System System
Enterprise System System System

Default Properties

Display name:QoS Packet Scheduler
Service name:Psched
Error control:normal

Default Behavior

The QoS Packet Scheduler service is a kernel mode driver. If QoS Packet Scheduler fails to start, the error is logged. Windows 8 startup proceeds, but a message box is displayed informing you that the Psched service has failed to start.


If QoS Packet Scheduler is stopped, the Quality Windows Audio Video Experience service fails to start and initialize.

Restore Default Startup Type of QoS Packet Scheduler

Automated Restore

1. Select your Windows 8 release and edition, and then click on the Download button below.

2. Save the RestoreQoSPacketSchedulerWindows8.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.

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 8 installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.