SMB 2.0 MiniRedirector (mrxsmb20) Service Defaults in Windows 10

Implements the SMB 2.0 protocol, which provides connectivity to network resources on Windows Vista and later servers.

Default Settings

Startup type:Manual
Display name:SMB 2.0 MiniRedirector
Service name:mrxsmb20
Service type:filesys
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mrxsmb20

Default Behavior

SMB 2.0 MiniRedirector is a file system driver. In Windows 10 it is starting only if the user, an application or another service starts it. If SMB 2.0 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 mrxsmb20 service has failed to start due to the error.


SMB 2.0 MiniRedirector cannot be started under any conditions, if the SMB MiniRedirector Wrapper and Engine service is disabled.

While SMB 2.0 MiniRedirector is stopped, the Workstation service cannot be launched.

Restore Default Startup Configuration for SMB 2.0 MiniRedirector

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

2. Save the Win10_mrxsmb20_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The mrxsmb20 service is using the mrxsmb20.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.