The application log is showing
"File Server Resource Manager failed to enumerate share paths or DFS paths. Mappings from local file paths to share and DFS paths may be incomplete or temporarily unavailable. FSRM will retry the operation at a later time.
Error: (0x8007054b) The specified domain either does not exist or could not be contacted.
Error: (0x80045306) The specified path is invalid......"
The error appears at least hourly and sometimes more frequently. It appears independent of applications running or not.
Found this on the net http://www.jsifaq.com/SF/Tips/Tip.aspx?id=10888
but authenticated users are already added to the builtin users group.
Sytem performence does not seem degraded.