Windows 11 Services

Redirected Buffering Sub System - Windows 11 Service

Provides the framework for network mini-redirectors.

This service also exists in Windows 10, 7, 8, Vista and XP.

Startup Type

Windows 11 version Home Pro Education Enterprise
21H2 System System System System
22H2 System System System System
23H2 System System System System

Default Properties

Display name:Redirected Buffering Sub System
Service name:rdbss
Error control:normal

Default Behavior

The Redirected Buffering Sub System service is a file system driver. If Redirected Buffering Sub System fails to start, the error is logged. Windows 11 startup proceeds, but a message box is displayed informing you that the rdbss service has failed to start.


Redirected Buffering Sub System is unable to start, if the Mup service is stopped or disabled.

If Redirected Buffering Sub System is stopped, the following services cannot start:

Restore Default Startup Type for Redirected Buffering Sub System

Automated Restore

1. Select your Windows 11 edition and release, and then click on the Download button below.

2. Save the RestoreRedirectedBufferingSubSystemWindows11.bat file to any folder on a local drive such as SSD or a hard disk.

3. Right-click the downloaded batch file and select Properties.

4. Check the Unblock checkbox and click OK.

5. Right-click the batch file again and select Run as administrator.

6. Restart the computer to save changes.

Note. Make sure that the rdbss.sys file exists in the %WinDir%\system32\DRIVERS folder. If this file is missing you can try to restore it from your Windows 11 installation media.

Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou art with me; thy rod and thy staff they comfort me.