Microsoft Virtual Drive Enumerator Driver (vdrvroot) Service Defaults in Windows 7

Virtual Drive Root Enumerator by Microsoft Corporation.

Default Settings

Startup type:Boot
Display name:Microsoft Virtual Drive Enumerator Driver
Service name:vdrvroot
Service type:kernel
Error control:critical
Group:Boot Bus Extender
Path:%SystemRoot%\system32\DRIVERS\vdrvroot.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vdrvroot

Default Behavior

Microsoft Virtual Drive Enumerator Driver is a kernel device driver. In Windows 7 it is being loaded by Boot Loader before Kernel initialization. If Microsoft Virtual Drive Enumerator 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 vdrvroot service, Windows 7 won't start.

Restore Default Startup Configuration for Microsoft Virtual Drive Enumerator 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 vdrvroot start= boot
sc start vdrvroot

3. Close the command window and restart the computer.

The vdrvroot service is using the vdrvroot.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.