The Offline Files service performs maintenance activities on the Offline Files cache, responds to user logon and logoff events, implements the internals of the public API, and dispatches interesting events to those interested in Offline Files activities and changes in cache state. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!Offline Files (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\CscService!Start