Windows XP Services

QoS Packet Scheduler - Windows XP Service

QoS Packet Scheduler.

This service also exists in Windows 10, 7, 8 and Vista.

Startup Type

Windows XP edition without SP SP1 SP2 SP3
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Default Properties

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

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 XP startup should proceed, but a message box is displayed informing you that the PSched service has failed to start.


QoS Packet Scheduler will not start, if the Generic Packet Classifier service is stopped or disabled.

Restore Default Startup Type for QoS Packet Scheduler

Automated Restore

1. Select your Windows XP edition and Service Pack, and then click on the Download button below.

2. Save the RestoreQoSPacketSchedulerWindowsXP.bat file to any folder on your hard drive.

3. Run the downloaded batch file.

4. Restart the computer to save changes.

Note. Make sure that the psched.sys file exists in the %WinDir%\system32\DRIVERS folder. If this file is missing you can try to restore it from your Windows XP 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.