this has been posted about like a couple billion times and plz stop making stupid posts but this is what you do:
open up the game but dont login then alt-tab to c:/nexon/combat arms/hshield then cut(not copy) and paste all teh files that end with .dll, .env, or .exe and also the folder that says update into a new folder you make called "update2" w/o quotes. now go back to the game and login and voila. no more d/c. thank me.