In general, security experts say that computers running on Windows are more vulnerable than Macintoshes. That's partly because there are more Windows-based machines, and, therefore, more hacking programs have been created to exploit them. If you use Windows and your computers aren't networked, turn off printer and file sharing. Leaving this feature on is like an open invitation to a hacker. Regularly download patches for your operating system, Web browser, e-mail programme and other software.
Hackers often exploit weaknesses in software.
When using passwords to help protect your computer files, use nonsense phrases or, ideally, passwords that contain both letters and numbers. Don't use your child's name, your birth date or anything else that someone could easily figure out. Don't give out your password. One way that hackers get into computers is by tricking you into giving out your password. Be wary of opening e-mail attachments, even if the message comes from someone you know, and be careful of downloading programmes from the Internet.