You install Application Control on a Domain Controller and set solidcore in Disabled mode. The DFS replication fails and setting Application Control to Update or Observe mode doesn't resolve the issue.
In the Application Control logs, you see entries similar to the following:
ERROR: fshooks.c : 687: Could not validate filename OR filename is invalid: \System Volume Information\DFSR\Private\{79CE0A82-CBCB-4F98-95B6-92CB8F3E0E80}-{02B8BF25-13B9-4442-BC13-B7D018BE1C80}\Staging\ContentSet{79CE0A82-CBCB-4F98-95B6-92CB8F3E0E80}-{02B8BF25-13B9-4442-BC13-B7D018BE1C80}\38\60186-{6330BEBC-F3A5-4D2D-A6BE-D8F8D68AED80}-v60138-{6330BEBC-F3A5-4D2D-A6BE-D8F8D68AED80}-v60186-Downloading.frx