thanks for all da help. actually i've already use n still using McAfee Stinger,Trend Micro Online Scan,Norton Online Scan,Ad-Aware,advanced system optimizer,track eraser pro,McAfee Internet Security,TCS. but..it still happend. i've already update all of it. one more thing...when i using trend micro online scan...its detect worm..if i'm not mistaken. well..its clean it. i've already format my pc 4 days ago. but..this problem still happend. hurm...i dont what to do....