stupid piece of shit (someone help me)

[geekdiggy]

my idiotic shitstack of a brother arbitrarily installed msn explorer (a program with which he is not familiar) and now the damn thing is invading my computer and i can't get rid of it. the msn explorer sign in window keeps popping up every 5 minutes and i tried using the control panel's add/remove programs to get rid of it but it doesn't work. the msn explorer icon is gone fron the add/remove programs window but the program is still on my computer. someone please tell me how to permanently remove this (or any other program) that still appears even after it was supposedly removed with the control panel.