[SOLVED] Cannot start a clean installation of MongoDB with a clean data directory UserNotFound

TLDR: I am unable to start a clean installation of Mongo (from ZIP) with an empty data directory, because of a UserNotFound Error (the not found user is from the old installation).

In more detail: My initial Mongo database is working fine. For testing purpose I moved my current data directory and created a new one. So I stopped my running Windows Service with

mongod --dbpath=C:\data\db --remove

created a new data directory and tried to start a new MongoDB in noauth mode with

mongod --dbpath=C:\data\db --noauth

And here begins the trouble: MongoDB tries to connect with an user from my old database which is nowhere mentioned in the current settings. Here is the log

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] MongoDB starting : pid=12508 port=27017 dbpath=C:\data\db 64-bit host=XXX

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] targetMinOS: Windows 7/Windows Server 2008 R2

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] db version v3.6.8-45-g4f1bd30460

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] git version: 4f1bd3046036a8621c2ad5acde7cdf103a533226

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2o-fips 27 Mar 2018

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] allocator: tcmalloc

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] modules: none

2018-10-23T04:45:47.323-0700 I CONTROL [initandlisten] build environment:

2018-10-23T04:45:47.327-0700 I CONTROL [initandlisten] distmod: 2008plus-ssl

2018-10-23T04:45:47.327-0700 I CONTROL [initandlisten] distarch: x86_64

2018-10-23T04:45:47.327-0700 I CONTROL [initandlisten] target_arch: x86_64

2018-10-23T04:45:47.327-0700 I CONTROL [initandlisten] options: { security: { authorization: "disabled" }, storage: { dbPath: "C:\data\db" } }

2018-10-23T04:45:47.330-0700 I - [initandlisten] Detected data files in C:\data\db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.

2018-10-23T04:45:47.330-0700 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=7379M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),cache_cursors=false,compatibility=(release="3.0",require_max="3.0"),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=(recovery_progress),

2018-10-23T04:45:47.569-0700 I STORAGE [initandlisten] WiredTiger message [1540295147:568779][12508:140717431611728], txn-recover: Main recovery loop: starting at 2/4736

2018-10-23T04:45:47.718-0700 I STORAGE [initandlisten] WiredTiger message [1540295147:718169][12508:140717431611728], txn-recover: Recovering log 2 through 3

2018-10-23T04:45:47.815-0700 I STORAGE [initandlisten] WiredTiger message [1540295147:815426][12508:140717431611728], txn-recover: Recovering log 3 through 3

2018-10-23T04:45:48.053-0700 I STORAGE [initandlisten] WiredTiger message [1540295148:53068][12508:140717431611728], txn-recover: Set global recovery timestamp: 0

2018-10-23T04:45:48.137-0700 I CONTROL [initandlisten]

2018-10-23T04:45:48.138-0700 I CONTROL [initandlisten] ** WARNING: This server is bound to localhost.

2018-10-23T04:45:48.138-0700 I CONTROL [initandlisten] ** Remote systems will be unable to connect to this server.

2018-10-23T04:45:48.138-0700 I CONTROL [initandlisten] ** Start the server with --bind_ip to specify which IP

2018-10-23T04:45:48.138-0700 I CONTROL [initandlisten] ** addresses it should serve responses from, or with --bind_ip_all to

2018-10-23T04:45:48.138-0700 I CONTROL [initandlisten] ** bind to all interfaces. If this behavior is desired, start the

2018-10-23T04:45:48.138-0700 I CONTROL [initandlisten] ** server with --bind_ip 127.0.0.1 to disable this warning.

2018-10-23T04:45:48.138-0700 I CONTROL [initandlisten]

2018-10-23T13:45:48.471+0200 W FTDC [initandlisten] Failed to initialize Performance Counters for FTDC: WindowsPdhError: PdhExpandCounterPathW failed with 'Das angegebene Objekt wurde nicht auf dem Computer gefunden.' for counter '\Memory\Available Bytes'

2018-10-23T13:45:48.471+0200 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory 'C:/data/db/diagnostic.data'

2018-10-23T13:45:48.473+0200 I NETWORK [initandlisten] waiting for connections on port 27017

2018-10-23T13:45:48.863+0200 I NETWORK [listener] connection accepted from 127.0.0.1:57924 #1 (1 connection now open)

2018-10-23T13:45:48.864+0200 I NETWORK [conn1] received client metadata from 127.0.0.1:57924 conn1: { driver: { name: "mongo-java-driver", version: "unknown" }, os: { type: "Windows", name: "Windows 10", architecture: "amd64", version: "10.0" }, platform: "Java/Oracle Corporation/1.8.0_171-b11" }

2018-10-23T13:45:48.865+0200 I ACCESS [conn1] SCRAM-SHA-1 authentication failed for fritz1338 on admin from client 127.0.0.1:57924 ; UserNotFound: Could not find user fritz1338@admin

2018-10-23T13:45:48.865+0200 I NETWORK [conn1] end connection 127.0.0.1:57924 (0 connections now open)

2018-10-23T13:45:49.366+0200 I NETWORK [listener] connection accepted from 127.0.0.1:57925 #2 (1 connection now open)

2018-10-23T13:45:49.367+0200 I NETWORK [conn2] received client metadata from 127.0.0.1:57925 conn2: { driver: { name: "mongo-java-driver", version: "unknown" }, os: { type: "Windows", name: "Windows 10", architecture: "amd64", version: "10.0" }, platform: "Java/Oracle Corporation/1.8.0_171-b11" }

2018-10-23T13:45:49.369+0200 I ACCESS [conn2] SCRAM-SHA-1 authentication failed for fritz1338 on admin from client 127.0.0.1:57925 ; UserNotFound: Could not find user fritz1338@admin

2018-10-23T13:45:49.370+0200 I NETWORK [conn2] end connection 127.0.0.1:57925 (0 connections now open)

2018-10-23T13:45:49.872+0200 I NETWORK [listener] connection accepted from 127.0.0.1:57926 #3 (1 connection now open)

2018-10-23T13:45:49.873+0200 I NETWORK [conn3] received client metadata from 127.0.0.1:57926 conn3: { driver: { name: "mongo-java-driver", version: "unknown" }, os: { type: "Windows", name: "Windows 10", architecture: "amd64", version: "10.0" }, platform: "Java/Oracle Corporation/1.8.0_171-b11" }

2018-10-23T13:45:49.875+0200 I ACCESS [conn3] SCRAM-SHA-1 authentication failed for fritz1338 on admin from client 127.0.0.1:57926 ; UserNotFound: Could not find user fritz1338@admin

2018-10-23T13:45:49.877+0200 I NETWORK [conn3] end connection 127.0.0.1:57926 (0 connections now open)

"fritz1338" is an user from my old db instance. If I move the old database directory to data\db everyting works fine again. But I cannot start a clean install from MongoDB.

What I have already tried:

create a brand new data\db directory
redownload MongoDB (ZIP File)
searched the entire PC and registry for references to a mongo configuration file (even though mongo does not use an config file by default)
removed the "mongo-java-driver" in my .m2 maven directory (evetn though it shouldn't been accessed)
run the mongod repair option with

mongod --dbpath=C:\data\db --repair

Can anyone tell me why aclean installation of MongoDB knows about an old username from another data directory?