Microsoft DFS
From My notepad
DFSR Event ID: 4004
Source: DFSR Event ID: 4004 The DFS Replication service stopped replication on the replicated folder at local path E:\DFS_TEST. Additional Information: Error: 997 (Overlapped I/O operation is in progress.) Additional context of the error: E:\DFS_TEST Replicated Folder Name: DFS_TEST Replicated Folder ID: 2EE4FEF1-A493-4286-BBB1-21D9B2D4F942 Replication Group Name: abmb-dfs-mad01\sa_replication\DFS_TEST Replication Group ID: 4324D8F1-260E-4060-94E7-B94E98A4E1F5 Member ID: EB5F694E-2D0F-4F22-B11C-BA9B27343192 For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
This was happening on a new server that had nothing but all Windows updates, Volume Shadow Copy and LogMeIn running on it. I stopped LogMeIn, restarted the DFS Replication service and everything started working immediately. I just wish I had realized this three days ago!