Exploiting human psychology rather than technical vulnerabilities. Phishing is a prime example.

Malware that bombards you with unwanted ads. More annoying than dangerous, but still a pain.

Malware that burrows deep into your system to hide itself. Notoriously hard to detect and remove.

Automated malware that lets hackers remotely control your computer.

Malware that spreads by copying itself, like a biological virus. Evolved into more advanced forms:

A self-replicating virus that spreads over networks without needing to piggyback on another program.

Malware that spies on your computer activity, collecting personal data to send to hackers.

Malware that encrypts your files and demands payment for the decryption key. Nasty stuff.

Tricking people into revealing sensitive info by posing as a trusted entity. Be wary of emails asking you to log in or download attachments.

Unsolicited bulk messages, usually email. Most inboxes filter spam out automatically.