Nvstor Service Defaults in Windows 7

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

Nvstor is a kernel device driver. In Windows 7 it won't be started if the user doesn't start it. If Nvstor fails to load, Windows 7 attempts to write the error data into Event Log and restart the computer, using the Last Known Good configuration. If the Last Known Good configuration is not valid, Windows 7 startup ends with a Stop error. If you remove or disable the nvstor service, Windows 7 won't 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 7 installation media.