- You are using a computer that is running Windows Server 2012 R2, Windows 8.1, Windows Server 2012, or Windows 8.
- The operating system includes two drivers that are configured to load at startup. For example, the system includes driverA.sys and driverB.sys, and you expect both to load at startup.
- When the computer starts, driverA.sys is used in the boot-up process but driverB.sys is not. Therefore, the system reconfigures the Start Type setting for driverB.sys from Boot Start to Demand Start.
- You change the computer hardware configuration. For example, you replace the PCI slot on an SAS controller to which the boot-up hard disk drive is attached. After you make this change, a device that is required to start the machine may require driverB.sys, which is now set to Demand Start instead of Boot Start.
The system has a built-in feature to reduce resource consumption by not loading unnecessary drivers. This feature determines whether a specific driver is set to load automatically at system startup but is not required during startup. If the driver is not required at startup, the system may change the driver to a start type of Demand Start.
Because of this feature, drivers that are necessary to start the system under alternative hardware configurations may be set to Demand Start. If the hardware configuration of the system changes, the system may not find the volume that is necessary to start the system. If this occurs, the Stop error that is mentioned in the "Symptoms" section is generated.
For more information about how to start in safe mode, see the following Microsoft Knowledge Base article:
Artikel-id: 3024175 – senaste granskning 6 jan. 2015 – revision: 1