One type of computer threat comes from vulnerabilities that are discovered in the software that you have installed on your computer.  This can be either the operating system itself or third party applications like Adobe products.  If left unpatched these vulnerabilities typically leave your computer open to attack in one of two ways: Visiting a malicious website that has a payload waiting for you or by worms which crawl around the net just looking for an open door. Even though worms are less common they are much worse since the only prerequisite to becoming infested besides not patching is to be connected to the Internet.  Either infection vector leaves you in bad shape and will more often than not require a reformat to eliminate the infestation. The following are the security alerts that have been issued by CNRE-IT in the past regarding these vulnerabilities and patches.  Also, please see our Security page for more information on protecting your computer.