look for the unity update wizard under voice software, that takes care of the patching
about antivirus options look here
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/41/requirements/40_41cusysreq.html#wp508025
Software Installed by the Cisco Unity Server Updates Wizard
http://www.cisco.com/en/US/docs/voice_ip_comm/unity/updates/wizard/cuupwz.html
HTH
java
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