Let me first off start by saying I realize a lot of you wont help me because of what I am asking. Let me just say, I am doing this out of curiosity. I am not trying to break into anyones protected files, or even ones that I forgot a password to. I am doing this entirely just to satisfy my curiosity. Ok, so here is the poop. I got bored the other night, and decided to try and learn how to break into password protected zip files. I looked around online, found some trials and played around. I found one that seems pretty good (KRyLack). My question is, does anyone know of a similar program that is multi-threaded? Waiting a week while it tries to brute force into file is horrible with my three remaining cores sitting there doing nothing. Thanks in advance to anyone who helps.