Abstract: The field of information technology is growing very fast and so there are more and more updates regularly. At the same time, the field of viruses are also going on the increase and even people complain that attacks on computers are mostly from within the intranet structure. So, if we are able to update the signature files of the antivirus that exist in the various computers that are used by the various members of the locality concerned, we can prevent to some extent, the problems of viruses. In order to do this, now a days, the system administrators send remainders to the concern people or the computers have to be set to update every few days or so. These systems have their own drawbacks. To avoid this hazard, we are providing an option of active packet oriented automatic signature file update.