WebDav Client Redirector Driver (MRxDAV) Service Defaults in Windows 8

Network Redirector that provides WebDAV file access for the WebClient service.

Default Settings

Startup type: Manual
Display name:WebDav Client Redirector Driver
Service name:MRxDAV
Service type:filesys
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MRxDAV

Default Behavior

The WebDav Client Redirector Driver service is a file system driver. In Windows 8 it will not be started until the user starts it. If WebDav Client Redirector Driver 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 MRxDAV service hasn't been started.


WebDav Client Redirector Driver can't start, if the Redirected Buffering Sub System service is disabled or not available.

If WebDav Client Redirector Driver is disabled, the WebClient service will not be started and initialized.

Restore Default Startup Configuration of WebDav Client Redirector Driver

Before you begin doing this, make sure that all the services on which WebDav Client Redirector Driver 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 MRxDAV start= demand

3. Close the command window and restart the computer.

The MRxDAV service is using the mrxdav.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 8 installation media.