QoS Packet Scheduler (PSched) Service Defaults in Windows XP
QoS Packet Scheduler.
Default Settings
| Startup type: | Manual |
| Display name: | QoS Packet Scheduler |
| Service name: | PSched |
| Service type: | kernel |
| Error control: | normal |
| Group: | PNP_TDI |
| Path: | %SystemRoot%\system32\DRIVERS\psched.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PSched |
Default Behavior
QoS Packet Scheduler is a kernel device driver. In Windows XP it won't start until the current user starts it. If the QoS Packet Scheduler fails to start, the technical information about the error is added to the Event Log. Windows XP startup should proceed, but a message box should be displayed informing the user that the PSched service has failed to start.
Dependencies
QoS Packet Scheduler depends on the Generic Packet Classifier service.
Restore Default Startup Configuration of QoS Packet Scheduler
Before you begin doing this, make sure that all the services on which QoS Packet Scheduler depends are configured by default and function properly. See the list of dependencies above.1. Run the Command Prompt.
2. Copy the command below, paste it into the command window and press ENTER:
sc config PSched start= demand
3. Close the command window and restart the computer.
The PSched service is using the psched.sys file that is located in the C:\Windows\system32\DRIVERS directory. If the file is removed or corrupted, read this article to restore its original version from Windows XP installation media.