"There's some ill planet reigns: I must be patient..." (Winter's Tale)

I have a big postcard size "alert" on my monitor which says "Trojan Detected" but when I follow the directions to remove the "trojan" it doesn't get removed and the big alert remains on my screen and I can't get rid of it. I am ahaving an awful timejust typingt these lines as you can tellll. I willl have to get this fixed before i can write any more blogs. sorry.