Last week I came to know about STEEM and was super excited to use this and like the concept and whole thing how it works! I feel its going to change the way Social Media Networking work and this is the future. Its like a decentralized open source social network with transparency and creativity behind the scenes. I love this and tried doing STEEM mining as well on Windows machine referring to https://steemit.com/steem/@tuck-fheman/how-to-mine-steem-in-windows. And it was easy to setup a miner which would mine STEEM as per configuration for you. I have created a Youtube Video tutorial for the people who have not tried it yet and would like to experiment with STEEM Mining. Below is the link:

STEEM MINING on Windows

Uploaded by CloudSentinels Studio on 2016-07-14.

Download the Steem Windows Miner created by bitcube.
Windows Binaries : https://github.com/btscube/steem/releases/tag/v0.8.5b

Download the Steem Blockchain provided by steemychicken1.
http://www.steemitup.eu/

Extract the miner and run steemd.exe

Copy blockchain files in \witness_node_data_dir\blockchain\database\block_num_to_block

In the config.ini file replace the appropriate things as described below :

P2P nodes to connect to on startup (may specify multiple times)

seed-node = 192.99.4.226:2001
seed-node = 46.252.27.1:1337
seed-node = 81.89.101.133:2001
seed-node = 52.4.250.181:39705
seed-node = 85.214.65.220:2001

name of witness controlled by this node (e.g. initwitness )

witness = "your-steem-account-name"

name of miner and its private key (e.g. ["account","WIF PRIVATE KEY"] )

miner = ["your-steem-account-name","5YourPrivateWIFKeyIsVeryLong"]

Private key: Permissions -> Active/Owner

Number of threads to use for proof of work mining

mining-threads = 2

You can define thread as per your configuration and desired CPU usage.

Restart steemd.exe and begin mining!

If you experience any issues and get errors or miner crashes, please refer to my video and other links in this post or feel free to comment here and we will try to resolve them.

You can also refer to https://steemd.com/steemhelp/@joseph/mining-steem-for-dummies
for trying mining on linux and later you can refer to
https://steemd.com/steem/@pfunk/guide-maximize-your-mining-hashrate-in-windows-by-mining-steem-in-a-vm
to further play with the things and get the best results from mining.

Important (Mining from Multiple Computers):

If you have more than one computer mining, then it is critical that only one of those computers is configured as a witness. To configure a steemd process as a witness (but not a miner) you will need the following configuration settings:

WIF Private Key of a witness, starts with a 5...

witness = "your-account-name"
private-key = <PrivateKey-WIF>

You must not specify a witness with the same account name, your-account-name, on more than one steemd instance that has the necessary private key. If this happens then both instances of steemd will produce a block at the same time. Other nodes on the network will see this double-signing and submit a proof to the network that will allow them to claim your entire account balance.