Offline Files Driver (CSC) Service Defaults in Windows 10

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

Default Settings

Startup type:
Windows 10 Home 1507N/A
Windows 10 Pro 1507System
Windows 10 Education 1507System
Windows 10 Enterprise 1507System
Windows 10 Home 1511N/A
Windows 10 Pro 1511System
Windows 10 Education 1511System
Windows 10 Enterprise 1511System
Windows 10 Home 1607N/A
Windows 10 Pro 1607System
Windows 10 Education 1607System
Windows 10 Enterprise 1607System
Windows 10 Home 1703N/A
Windows 10 Pro 1703System
Windows 10 Education 1703System
Windows 10 Enterprise 1703System
Windows 10 Home 1709N/A
Windows 10 Pro 1709System
Windows 10 Education 1709System
Windows 10 Enterprise 1709System
Windows 10 Home 1803N/A
Windows 10 Pro 1803System
Windows 10 Education 1803System
Windows 10 Enterprise 1803System
Windows 10 Home 1809N/A
Windows 10 Pro 1809System
Windows 10 Education 1809System
Windows 10 Enterprise 1809System
Windows 10 Home 1903N/A
Windows 10 Pro 1903System
Windows 10 Education 1903System
Windows 10 Enterprise 1903System
Windows 10 Home 2004N/A
Windows 10 Pro 2004System
Windows 10 Education 2004System
Windows 10 Enterprise 2004System
Windows 10 Home 20H2N/A
Windows 10 Pro 20H2System
Windows 10 Education 20H2System
Windows 10 Enterprise 20H2System
Windows 10 Home 21H1N/A
Windows 10 Pro 21H1System
Windows 10 Education 21H1System
Windows 10 Enterprise 21H1System
Windows 10 Home 21H2N/A
Windows 10 Pro 21H2System
Windows 10 Education 21H2System
Windows 10 Enterprise 21H2System
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.