Viruses, trojans, and worms are often injected into unsuspecting (and unprepared) systems through spam emails. The cost of licensing and operating effective spam filters and virus protection can be a drain on your company's finances. Even if you do decide to use desktop virus protection, which can be cheaper, current updates and downloads are essential to the effectiveness of the filters. It only takes one missed download to allow a virus into the network, wreaking havoc on an unprepared system and costing thousands of dollars and untold hours to repair.