Blackhole toolkit website 21

Had a message of a high risk attack from "blackhole toolkit website 21". It said that the attacking computer was my computer. Apart from it saying that it was blocked, is there anything else I should do? Do I need to get rid of something on my computer? Why is my computer the attacking computer? Have I got a problem?

Had a message of a high risk attack from "blackhole toolkit website 21". It said that the attacking computer was my computer. Apart from it saying that it was blocked, is there anything else I should do? Do I need to get rid of something on my computer? Why is my computer the attacking computer? Have I got a problem?