Offline Files Driver (CSC) Service Defaults in Windows 10

Allows network files to be used while the local computer is offline.

The Offline Files Driver service does not exist in:

Default Settings

Startup type: System
Display name:Offline Files Driver
Service name:CSC
Service type:kernel
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CSC

Default Behavior

Offline Files Driver is a kernel device driver. In Windows 10 it is starting at Kernel initialization. If Offline Files Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the CSC service has failed to start due to the error.


Offline Files Driver cannot be started under any conditions, if the Redirected Buffering Sub System service is disabled.

Restore Default Startup Configuration of Offline Files Driver

Before you begin doing this, make sure that all the services on which Offline Files 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 commands below, paste them into the command window and press ENTER:

sc config CSC start= system
sc start CSC

3. Close the command window and restart the computer.

The CSC service is using the csc.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.