Processor Driver Service Defaults in Windows 11
Default Settings
| Startup type: | Manual |
| Display name: | Processor Driver |
| Service name: | Processor |
| Service type: | kernel |
| Error control: | normal |
| Group: | Extended Base |
| Path: | %SystemRoot%\System32\drivers\processr.sys |
| Registry key: | HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Processor |
Default Behavior
Processor Driver is a kernel driver. In Windows 11 it starts only if the user, an application or another service starts it. If Processor Driver fails to start, the failure details will be recorded into Event Log. Then Windows 11 should boot up and notify the user about the Processor service startup failure.
Restore Default Startup Configuration of Processor Driver
1. Run the Command Prompt as an administrator.
2. Copy the command below, paste it into the command window and press ENTER:
sc config Processor start= demand
3. Close the command window and restart the computer.
The Processor service is using the processr.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 11 installation media.