Offline Files Driver (CSC) Service Defaults in Windows 7

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

Default Settings

Startup type:
Windows 7 Starter SP0N/A
Windows 7 Home Basic SP0N/A
Windows 7 Home Premium SP0N/A
Windows 7 ProfessionalSystem
Windows 7 UltimateSystem
Windows 7 EnterpriseSystem
Windows 7 Starter SP1N/A
Windows 7 Home Basic SP1N/A
Windows 7 Home Premium SP1N/A
Windows 7 Professional SP1System
Windows 7 Ultimate SP1System
Windows 7 Enterprise SP1System
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 7 it is being loaded at Kernel initialization. If Offline Files Driver fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the CSC service is not running because of the error.


Offline Files Driver is unable to start, if the Redirected Buffering Sub Sysytem service is stopped or disabled.

Restore Default Startup Configuration for Offline Files Driver

1. Select your Windows 7 edition and service pack, and then click Download.

2. Save the Win7_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 7 installation media.