Enables you to synchronize folders on multiple servers across local or wide area network (WAN) network connections. This service uses the Remote Differential Compression (RDC) protocol to update only the portions of files that have changed since the last replication. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!DFS Replication (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\DFSR!Start