SMB 1.x MiniRedirector (mrxsmb10) Service Defaults in Windows 10

Implements the SMB 1.x (CIFS) protocol. This protocol provides connectivity to network resources on pre-Windows Vista servers.

Default Settings

Startup type:Automatic
Display name:SMB 1.x MiniRedirector
Service name:mrxsmb10
Service type:filesys
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mrxsmb10

Default Behavior

SMB 1.x MiniRedirector is a file system driver. In Windows 10 it is starting automatically when the operating system starts. If SMB 1.x MiniRedirector fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the mrxsmb10 service has failed to start due to the error.


SMB 1.x MiniRedirector cannot be started under any conditions, if the SMB MiniRedirector Wrapper and Engine service is disabled.

Restore Default Startup Configuration for SMB 1.x MiniRedirector

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_mrxsmb10_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The mrxsmb10 service is using the mrxsmb10.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 10 installation media.