Hack Detected?

During the start of September my family changed our internet connection company from RCN to Time Warner Cable. Ever since than a random popup claiming hack detected has shut me down from playing crossfire. I don't understand what it means and i never have hacked. This has never happened to me before and i don''t know if its something harmful to my computer. Whenever i load crossfire, Xtrap and HGW detects nothing wrong with my computer and i can play normally fine. Than randomly in the middle of a game at a random time, it just pops up and shuts down cf. I''ve tried deleting all crossfire related folders and links and redownloading CF a couple of times but the popup is still showing. I don't know if it's a bug or software i have for other games or what. All i know is everytime the popup comes up, it says "Hack Detected 5:0:0:0" or "4:0:0:0" or some random number and 3 0's after