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 of SMB 2.0 MiniRedirector

Before you begin doing this, make sure that all the services on which SMB 2.0 MiniRedirector depends are configured by default and function properly. See the list of dependencies above.

1. Run the Command Prompt as an administrator.

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

sc config mrxsmb20 start= demand

3. Close the command window and restart the computer.

The mrxsmb20 service is using the mrxsmb20.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.