Always use caution when opening attachments from email, chat sessions and other messages.

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Opening attachments can be a major way malware, phishing, and other attacks enter a system, so you should approach them with caution every time. Attachments—especially executable files, macro-enabled documents, password-protected archives, or compressed files containing suspicious payloads—can trigger infections or steal information if opened from untrusted sources or without verifying legitimacy. To stay safe, verify the sender through a separate channel if something seems off, be wary of unexpected or oddly titled files, and avoid enabling macros or executing attached programs. Use up-to-date antivirus scanning, preview or open attachments in a secure viewer when possible, and keep your software and operating system current. While legitimate attachments do exist, the default approach should be to treat every attachment as potentially risky, which is why this statement is true.