batcmd.com Windows 7 Services

Dynamic Volume Manager - Windows 7 Service

Extension of the volume manager driver that manages software RAID volumes (spanned, striped, mirrored, RAID-5) on dynamic disks.

This service also exists in Windows 10, 8 and Vista.

Startup Type

Windows 7 edition without SP SP1
Starter Boot Boot
Home Basic Boot Boot
Home Premium Boot Boot
Professional Boot Boot
Ultimate Boot Boot
Enterprise Boot Boot

Default Properties

Display name:Dynamic Volume Manager
Service name:volmgrx
Type:kernel
Path:%WinDir%\System32\drivers\volmgrx.sys
Error control:critical
Group:System Bus Extender

Default Behavior

The Dynamic Volume Manager service is a kernel driver. If the Dynamic Volume Manager fails to load or initialize, the error is logged and the computer attempts to restart with the LastKnownGood configuration. If the LastKnownGood configuration fails, Windows 7 startup also fails, and the boot process halts with a Stop error. If you disable this service, Windows 7 will fail to start. Do NOT change this service startup configuration if your computer is working.

Restore Default Startup Type for Dynamic Volume Manager

Automated Restore

1. Select your Windows 7 edition and Service Pack, and then click on the Download button below.

2. Save the RestoreDynamicVolumeManagerWindows7.bat file to any folder on your hard drive.

3. Right-click the downloaded batch file and select Run as administrator.

4. Restart the computer to save changes.

Note. Make sure that the volmgrx.sys file exists in the %WinDir%\System32\drivers folder. If this file is missing you can try to restore it from your Windows 7 installation media.