Offline Files Driver (CSC) Service Defaults in Windows 8

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

Default Settings

Startup type:
Windows 8 Core Windows 8N/A
Windows 8 ProSystem
Windows 8 EnterpriseSystem
Windows 8 Core Windows 8.1N/A
Windows 8.1 ProSystem
Windows 8.1 EnterpriseSystem
Windows 8 Core Windows 8.1 Update 1N/A
Windows 8.1 Update 1 ProSystem
Windows 8.1 Update 1 EnterpriseSystem
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

The Offline Files Driver service is a kernel device driver. In Windows 8 it is being loaded and initialized at Kernel initialization. If Offline Files 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 CSC service hasn't been started.


Offline Files Driver can't start, if the Redirected Buffering Sub System service is disabled or not available.

Restore Default Startup Configuration for Offline Files Driver

1. Select your Windows 8 edition and update pack, and then click Download.

2. Save the Win8_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 corrupted or deleted, you can put it back in there.