SMB 2.0 MiniRedirector (mrxsmb20) Service Defaults in Windows 8

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

The SMB 2.0 MiniRedirector service is a file system driver. In Windows 8 it will not be started until the user starts it. If SMB 2.0 MiniRedirector fails to start, the error details are added to Windows 8 error log. When the operating system startup is complete, the user is being notified that the mrxsmb20 service hasn't been started.


SMB 2.0 MiniRedirector can't start, if the SMB MiniRedirector Wrapper and Engine service is disabled or not available.

All the services listed below will not start if SMB 2.0 MiniRedirector is disabled:

Restore Default Startup Configuration for SMB 2.0 MiniRedirector

1. Select your Windows 8 edition and update pack, and then click Download.

2. Save the Win8_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 corrupted or deleted, you can put it back in there.