The best-selling, easiest, step-by-step, comprehensive guide to securing your home or business OS X computers. Completely revised and updated for OS X 10.10, Yosemite. Covers all versions of OS X 10.7-10.10

Official workbook for the Practical Paranoia: Security Essentials Workshop. Designed for both workshop use and self-study. The entire workshop is contained within the book. Includes all instructor presentations, hands-on assignments, links to all software, and security checklist.

You don't need to be paranoid to know they are out there to get your computer, data, and identity....

New edition, v2.78, updated June 6, 2017.

The best-selling, easiest, step-by-step, and most comprehensive guide to securing your home or business Windows 10 computers. Completely revised and updated for Windows 10.

Official workbook for the Practical Paranoia: Security Essentials Workshop. Designed for classroom, workshop, and self-study. The entire workshop is contained within the book. Includes all instructor presentations, hands-on assignments, links to all software, and security checklist.

You don't need to be...

New 1.4.4 edition, updated February 17, 2016.

The best-selling, easiest, step-by-step, most comprehensive guide to securing your home or business OS X computers. Completely revised and updated for OS X 10.11, El Capitan.

Official workbook for the Practical Paranoia: Security Essentials Workshop. Designed for both workshop use and self-study. The entire workshop is contained within the book. Includes all instructor presentations, hands-on assignments, links to all software, and security checklist.

You don't need to be paranoid to know they are out there to get your computer, data,...