Conficker , a feared computer virus , has n't caused much damage yet . Some experts disagree about whether it itself has passed . Worm made news because of an supposed April Fool 's Day joke . Some infected computers have received malicious anti - virus software .
Conficker , a feared computer worm , has n't caused much damage yet . Security experts disagree about whether Conficker threat has passed . Worm made news because of an supposed April Fool 's Day attack . Some infected computers have received malicious anti-virus software .