Lets put it this way?
No one else appears to have got this 'Virus' Message, correct?
It is obviously not FileTrip?
Hey, i dont REALLY like FileTrip, but ill defend it XD
What i believe it might be, is you have obtained a virus/malware/spyware or something along those lines, and it has placed itself in your temp net files on your cookies or something, and it just so happens to be in the Filetrip one, It'll be interesting to see if you clear your cookies and history and see if it resolves the problem, alos , keep off the pr0n XD