Malware comes in many forms including viruses, trojans, worms, spyware, and adware, and is often installed through downloading programs or visiting malicious websites. It is important to keep antivirus software updated, use firewalls, be wary of emails requesting personal information, and think critically about unexpected messages in order to protect against malware, social engineering, and phishing attempts. While antivirus software may not catch everything, it provides effective protection against many threats if it is used and updated regularly. Personal information posted publicly can be used by scammers in phishing messages, so be cautious of unknown senders even on special occasions.