How much backup is enough? If your computer is on a network, who can read your files? How long would it take to get your computer up and running again after a flood or lightning strikes? Security expert Michael Alexander (who has himself lost enough data to fill a small black hole) takes you step by step through the basics of practical computer security for everyone, whether you're on a LAN in an office, dialing up from your portable, or running your own small business on one machine. In The Underground Guide to Computer Security you'll learn how to evaluate the many hardware and software options available to protect your computer and your data. You'll get expert advice on how to choose the best antivirus software, backup system, power protection gear, diagnostic utilities, and encryption programs. Create hacker-proof passwords. Keep your information safe - and private! - in a networked world. Get practical strategies to protect yourself from coworkers using the company LAN to snoop through your files as well as from professional information thieves on dial-up services and the Internet. Develop simple back-up and disaster recovery plans that offer the right amount of information security for your needs. And much more! Every page has something you can use immediately. This book is packed wall to wall with hands-on advice, warnings, tips, virus alerts, workarounds, and the kind of nitty-gritty explanations that could only come from someone who eats, sleeps, and breathes computer security.