What you need is the ability to use a search engine. There are HUNDREDS of videos and tutorials ALREADY on the very same question you are asking.
Thank you and sorry if i post it in the wrong thread
You are in the correct thread, what he try to induce in to your senses is that Your concern is searchable and were already ask repeatedly. A simple google search will do.
your concern is posted in below thread. PLEASE start reading.
https://bitcointalk.org/index.php?topic=2345911.0