Download a ming software like claymore (the most effective at this time)

https://github.com/nanopool/Claymore-Dual-Miner/releases

edit the file start_only_eth.bat

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100

EthDcrMiner64.exe -epool http://YourPublicIP:30303

or if you want to use a pool

EthDcrMiner64.exe -epool examplepool.com:3333 -ewal yourwallet -epsw x -eworker rig1