Volume Manager Driver (volmgr) Service Defaults in Windows 7

Volume Manager Driver by Microsoft Corporation.

Default Settings

Startup type:Boot
Display name:Volume Manager Driver
Service name:volmgr
Service type:kernel
Error control:critical
Group:System Bus Extender
Path:%SystemRoot%\system32\DRIVERS\volmgr.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\volmgr

Default Behavior

Volume Manager Driver is a kernel device driver. In Windows 7 it is being loaded by Boot Loader before Kernel initialization. If Volume Manager Driver 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 volmgr service, Windows 7 won't start.

Restore Default Startup Configuration for Volume Manager Driver

1. Run the Command Prompt as an administrator.

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

sc config volmgr start= boot
sc start volmgr

3. Close the command window and restart the computer.

The volmgr service is using the volmgr.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.