Mount Point Manager (mountmgr) Service Defaults in Windows 8

Driver responsible with maintaining persistent drive letters and names for volumes.

Default Settings

Startup type:Boot
Display name:Mount Point Manager
Service name:mountmgr
Service type:kernel
Error control:critical
Group:System Bus Extender
Path:%SystemRoot%\System32\drivers\mountmgr.sys
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mountmgr

Default Behavior

The Mount Point Manager service is a kernel device driver. In Windows 8 it is being loaded by Boot Loader before Kernel initialization. If Mount Point Manager fails to load or initialize, the error details should be automatically logged. Then Windows 8 is restarting the PC and attempting to use the Last Known Good configuration. If the Last Known Good configuration isn't working properly, Windows 8 startup ends with a Stop error. If you disable the mountmgr service, Windows 8 will fail to start.

Restore Default Startup Configuration for Mount Point Manager

1. Run the Command Prompt as an administrator.

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

sc config mountmgr start= boot
sc start mountmgr

3. Close the command window and restart the computer.

The mountmgr service is using the mountmgr.sys file that is located in the %WinDir%\System32\drivers folder. If the file is corrupted or deleted, you can put it back in there.