installation - ogr2ogr missing drivers

I have a problem here with installing ogr .. I followed this very usefull tutorial for installing ogr on Windows systems: http://sandbox.idre.ucla.edu/sandbox/tutorials/installing-gdal-for-windows It seemed to work, because I can call ogr from commandline afterwards.

C:\Users\root>gdalinfo --version
GDAL 2.1.0, released 2016/04/25

But when I try to use ogr2ogr it says that it can't find the drivers. I'm on this for hours now but can't get it to work. How do I register the drivers? The path is set correctly and I tried like thousands of different installations. All on a clean Virtual Machine which I reset after every failed installation ..

Please help me, I'm desperate :D

Edit: This is the result I get when typing set g:

C:\Users\root>set G
GDAL_DATA=C:\Program Files (x86)\GDAL\gdal-data
GDAL_DRIVER_PATH=C:\Program Files (x86)\GDAL\gdalplugins

Which exactly matches my installation ..

Edit2: When I'm trying to convert:

C:\Users\root>ogr2ogr -f "GeoJSON" "C:\Users\root\Desktop\Plugin\Shapefiles_Karte\Bundeslaender\Bundeslaender.geojson" "C:\Users\root\Desktop\Plugin\Shapefiles_Karte\Bundeslaender\Bundeslaender.shp" -overwrite
FAILURE:
Unable to open datasource `C:\Users\root\Desktop\Plugin\Shapefiles_Karte\Bundeslaender\Bundeslaender.shp' with the following drivers.

  -> netCDF
  -> PCIDSK
  -> JP2OpenJPEG
  -> DB2ODBC
  -> ESRI Shapefile
  -> MapInfo File
  -> UK .NTF
  -> OGR_SDTS
  -> S57
  -> DGN

  -> OGR_VRT
  -> REC
  -> Memory
  -> BNA
  -> CSV
  -> NAS
  -> GML
  -> GPX
  -> LIBKML
  -> KML

  -> GeoJSON
  -> Interlis 1
  -> Interlis 2
  -> OGR_GMT
  -> GPKG
  -> SQLite
  -> ODBC
  -> WAsP
  -> PGeo
  -> MSSQLSpatial

  -> PostgreSQL
  -> MySQL
  -> OpenFileGDB
  -> XPlane
  -> DXF
  -> Geoconcept
  -> GeoRSS
  -> GPSTrackMaker
  -> VFK
  -> PGDUMP

  -> OSM
  -> GPSBabel
  -> SUA
  -> OpenAir
  -> OGR_PDS
  -> WFS
  -> HTF
  -> AeronavFAA
  -> Geomedia
  -> EDIGEO

  -> GFT
  -> SVG
  -> CouchDB
  -> Cloudant
  -> Idrisi
  -> ARCGEN
  -> SEGUKOOA
  -> SEGY
  -> ODS
  -> XLSX

  -> ElasticSearch
  -> Walk
  -> CartoDB
  -> SXF
  -> Selafin
  -> JML
  -> PLSCENES
  -> CSW
  -> VDV
  -> TIGER

  -> AVCBin
  -> AVCE00
  -> HTTP