Processor Driver - Windows Vista Service
Processor Device Driver by Microsoft Corporation.
This service also exists in Windows 10, 11, 7, 8 and XP.
Startup Type
Since Processor Driver is a kernel mode driver, its startup might be configured depending on installed hardware. Changing its startup configuration might cause hardware issues. In the table below you can see how it is configured on my system, but your default settings might differ from mine.
| Windows Vista edition | without SP | SP1 | SP2 |
|---|---|---|---|
| Starter | Disabled | Disabled | Disabled |
| Home Basic | Disabled | Disabled | Disabled |
| Home Premium | Disabled | Disabled | Disabled |
| Business | Disabled | Disabled | Disabled |
| Ultimate | Disabled | Disabled | Disabled |
Default Properties
| Display name: | Processor Driver |
| Service name: | Processor |
| Type: | kernel |
| Path: | %WinDir%\system32\drivers\processr.sys |
| Error control: | normal |
| Group: | Extended Base |
Default Behavior
The Processor Driver service is a kernel mode driver. If Processor Driver fails to start, the error is recorded into the Event Log. Windows Vista startup proceeds, but a message box is displayed informing you that the Processor service has failed to start.
Restore Default Startup Type of Processor Driver
Automated Restore
1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.
2. Save the RestoreProcessorDriverWindowsVista.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 processr.sys file exists in the %WinDir%\system32\drivers folder. If this file is missing you can try to restore it from your Windows Vista installation media.