Mount Point Manager (mountmgr) Service Defaults in Windows 10

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
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mountmgr

Default Behavior

Mount Point Manager is a kernel device driver. In Windows 10 it is starting by the operating system Boot Loader as a part of the driver stack for the boot volume. If Mount Point Manager fails to load or initialize, Windows 10 attempts to record the error details into Event Log and restart the PC, using the Last Known Good configuration. If the Last Known Good configuration cannot be applied or working improperly, Windows 10 startup process halts with a Stop error. If you disable or delete the mountmgr service, Windows 10 won't start.

Restore Default Startup Configuration of 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 C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.