Not an answer, I'm afraid, but I've got the same question so wondered if I could piggy-back onto the thread.
My Trend Micro virus table gave me a Netski.P warning yesterday on an email attachment. I've deleted the email but that doesn't actually deal with the offending code. My virus prog cannot automatically destroy it and instead requires for it to be done manually. This is probably the same in your case. However, the instructions on the Trend site were as clear as mud so I'm none the wiser as to how to do it.
I think what we need is advice on how to manually destroy the virus. Qustion: if we've deleted the files, will running a defrag scramble them and render them inactive?