I have followed several guides t mine and I keep getting the same error. I currently have a windows 10 box mining ethereum and I wanted to mine Steem on it.

I keep getting: 

C:\steem>steemd

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            STARTING STEEM NETWORK

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initminer public key: XXXXXICHANGEDXXXX

chain id: 0000000000000000000000000000000000000000000000000000000000000000

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946346ms th_a       main.cpp:119                  main                 ] Error parsing logging config from config file C:\steem\witness_node_data_dir\config.ini, using default config

946354ms th_a       main.cpp:158                  main                 ] parsing options

946358ms th_a       main.cpp:160                  main                 ] initializing node

946362ms th_a       main.cpp:162                  main                 ] initializing plugins

946388ms th_a       application.cpp:979           initialize_plugins   ] Initializing plugin account_history

946408ms th_a       application.cpp:979           initialize_plugins   ] Initializing plugin witness

946420ms th_a       witness.cpp:95                plugin_initialize    ] witness plugin:  plugin_initialize() begin

946449ms th_a       witness.cpp:165               plugin_initialize    ] 4 parse_error_exception: Parse Error

Unexpected char '-30' in ""

    {"c":-30,"s":""}

    th_a  json.cpp:433 fc::variant_from_stream

    {"str":"ΓÇ£erik-prestinaryΓÇ¥"}

    th_a  json.cpp:478 fc::json::from_string

946479ms th_a       main.cpp:196                  main                 ] Exiting with error:

4 parse_error_exception: Parse Error

Unexpected char '-30' in ""

    {"c":-30,"s":""}

    th_a  json.cpp:433 fc::variant_from_stream

    {"str":"ΓÇ£erik-prestinaryΓÇ¥"}

    th_a  json.cpp:478 fc::json::from_string

rethrow

    {}

    th_a  witness.cpp:165 steemit::witness_plugin::witness_plugin::plugin_initialize

C:\steem>

Can someone help me out here? 

I tried with all the Private keys I could find inside my steem wallet, which one should I use?

Thanks!