Yesterday I started receiving this error message from my FreeNAS box (IP address 192.168.1.40 is one of my Win7 64 bit machines). NAS smbd[60418]: [2014/04/27 14:55:45.951270, 0] ../source3/rpc_server/svcctl/srv_svcctl_nt.c:326(_svcctl_OpenServiceW) Apr 27 14:56:47 NAS smbd[60418]: _svcctl_OpenServiceW: Failed to get a valid security descriptor_svcctl_OpenServiceW: Failed to get a valid security descriptork50in (ipv4:192.168.1.40:53368) closed connection to service data https://bugs.freenas.org/issues/4891 We are requesting debug logs and smb.conf from the user.