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
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 for Offline Files Driver

1. Select your Windows 10 edition and release, and then click Download.

2. Save the Win10_CSC_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The CSC service is using the csc.sys file that is located in the %WinDir%\system32\drivers folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 10 installation media.