Hi Shaji,
It might be better to verify the size of the attachment before issuing
warnings.
You see, most of the messages that contain the full virus payload are now being
blocked from MSNews.
Messages with the one-byte Zip file (like the one you are referring to) are
still getting through. They are annoying but innocuous.
BTW, the newsgroups have been flakey lately because of the counter-measures.
Things should settle down in a couple of days or sooner.