Nvstor Service Defaults in Windows 8

NVIDIA® nForce(TM) Sata Performance Driver by NVIDIA Corporation.

Default Settings

Startup type: Manual
Display name:Nvstor
Service name:nvstor
Service type:kernel
Error control:critical
Group:SCSI Miniport
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\nvstor

Default Behavior

The Nvstor service is a kernel device driver. In Windows 8 it will not be started until the user starts it. If Nvstor fails to load or initialize, the error details should be automatically logged. Then Windows 8 is restarting the PC and attempting to use the Last Known Good configuration. If the Last Known Good configuration isn't working properly, Windows 8 startup ends with a Stop error. If you disable the nvstor service, Windows 8 will fail to start.

Restore Default Startup Configuration of Nvstor

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config nvstor start= demand

3. Close the command window and restart the computer.

The nvstor service is using the nvstor.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 8 installation media.