Storage volumes (volsnap) Service Defaults in Windows 7

Volume Shadow Copy Driver by Microsoft Corporation.

Default Settings

Startup type:Boot
Display name:Storage volumes
Service name:volsnap
Service type:kernel
Error control:critical
Path:%SystemRoot%\system32\DRIVERS\volsnap.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\volsnap

Default Behavior

Storage volumes is a kernel device driver. In Windows 7 it is being loaded by Boot Loader before Kernel initialization. If Storage volumes 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 volsnap service, Windows 7 won't start.

Restore Default Startup Configuration for Storage volumes

1. Run the Command Prompt as an administrator.

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

sc config volsnap start= boot
sc start volsnap

3. Close the command window and restart the computer.

The volsnap service is using the volsnap.sys file that is located in the %WinDir%\system32\DRIVERS folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.