Restart or Press Ctrl+Alt+Delte and a task manager will open. Press process and click the tab, user name. Right click and end precess the hacks if they are running. Easier way is just Restart. Then try to delete the hacks, but to delete crossfire, click start, all programs, subagames, crossfire, uninstall crossfire, then follow the uninstall instructions.
then re-download crossfire from the link abooooove^^^^