Recent studies from Verizon and Symantec show that malicious hackers almost always gain unauthorized access to computer systems because of misconfigured software and user errors. You don’t have to be a genius hacker to get into a supposedly secure system if a sysadmin left the door wide open, or if you can fool a gullible user into revealing their password.

As a user, you’re probably getting tired of being told to be careful when clicking links on the web and in email. But it’s good advice. If you receive an email message that includes a link, and tells you to click the link, think before you click. If someone asks you for your password, do not give it to them.