Without creating an admin user, start mongod with "--auth". TTLMonitor issues error messages. This may be expected; it just looks funny.
18:59:41.88 G:\MongoDB\tadmarshall\mongo> mongod --auth db level locking enabled: 1 Mon May 21 18:59:44 [initandlisten] MongoDB starting : pid=1944 port=27017 dbpath=\data\db\ 64-bit host=MissLucy Mon May 21 18:59:44 [initandlisten] Mon May 21 18:59:44 [initandlisten] ** NOTE: This is a development version (2.1.2-pre-) of MongoDB. Mon May 21 18:59:44 [initandlisten] ** Not recommended for production. Mon May 21 18:59:44 [initandlisten] Mon May 21 18:59:44 [initandlisten] db version v2.1.2-pre-, pdfile version 4.5 Mon May 21 18:59:44 [initandlisten] git version: 0a5953d46bb50c12095054ab434a56fd9e7f1172 Mon May 21 18:59:44 [initandlisten] build info: windows sys.getwindowsversion(major=6, minor=1, build=7601, platform=2, service_pack='Service Pack 1') BOOST_LIB_VERSION=1_49 Mon May 21 18:59:44 [initandlisten] options: { auth: true } Mon May 21 18:59:44 [initandlisten] journal dir=/data/db/journal Mon May 21 18:59:44 [initandlisten] recover : no journal files present, no recovery needed Mon May 21 18:59:44 [websvr] admin web console waiting for connections on port 28017 Mon May 21 18:59:44 [initandlisten] waiting for connections on port 27017 Mon May 21 19:00:44 [TTLMonitor] assertion 10057 unauthorized db:admin ns:admin.system.indexes lock type:0 client:0.0.0.0 ns:admin.system.indexes query:{ expireAfterSeconds: { $exists: true } } Mon May 21 19:00:44 [TTLMonitor] { $err: "unauthorized db:admin ns:admin.system.indexes lock type:0 client:0.0.0.0", code: 10057 } Mon May 21 19:00:44 [TTLMonitor] ERROR: backgroundjob TTLMonitorerror: invalid parameter: expected an object () Mon May 21 19:00:44 [TTLMonitor] ERROR: Client::shutdown not called: TTLMonitor Mon May 21 19:00:44 [clientcursormon] mem (MB) res:28 virt:94 mapped:0