Computer viruses and security leaks make the news almost every month. Local area networks are particulary vulnerable-one tiny virus can wipe out weeks of work by dozens of people and erase megabytes of data in a flash. Now Stephen Cobb has compiled a total guide to PC and LAN security, covering everything the computer user needs to protect valuable data from leaks and bugs. Cobb describes how to protect hardware through the multiple means of alarm and security systems, product registration and insurance, fault tolerance, and more. He covers software protection, discussing encryption systems, passwords, add-ons, alternative power supplies, and backup strategies.