I see you're using a laptop, well in that case you are most definitely wasting your time with BTC. To be totally honest, A laptop isn't ideal especially with only an M850. If you had an Apache GE62 or 63 with a 1060 in then you would be able to focus on some harder hash rate coins. For what you have, without damaging your machine and provided you can get electricity for dirt cheap, I would use something like ccminer (https://github.com/tpruvot/ccminer/releases) get the version that best suits your machine. Then head over to to http://yiimp.ccminer.org/ and see what coin you want to mine in a pool. You don't need to setup any accounts or anything. Within the ccminer folder when you extract it, you just edit the .BAT file and put in your wallet address, remove the last bit so the end of the string ends with your -p and then change the start of line to whatever coin you want to mine and choose a port number for the pool you want to mine in. Its very simple and would be ideal for you to start with. With your setup I would choose a coin like LBRY credits as it's still relatively easy to mine and cheap, but the price constantly goes up and down so you could spin some decent profits. Just give me a shout if you get stuck with anything.