Question, please help!

okay so all my keys are getting banned that i buy in like one day. i was wondeing if that had to do anything with like my game haveing files of hacks in them or something. and if i was to buy Arma CO on a different steam account i could play fine no problem without ban?

Okay. I completely deleted everything, old game files uninstalled from other account all that jazz, I'd rather not get banned again