Use a trusted, updated antivirus to run a "Full System Scan."

The phrase "now" pressures you to act before thinking.

Automated security "sandboxes" may time out before they can fully analyze a file of that size. 3. Immediate Action Plan If you see this subject line in your inbox:

Turn off your Wi-Fi or unplug your ethernet cable immediately to stop the malware from "calling home" to a command server.

Most malicious documents (macros) are tiny. However, "bloating" a file to over 100 MB is a known technique called .

Listing a specific size like "156.07 MB" makes the email look like an automated system notification (like Dropbox or WeTransfer), adding a false sense of legitimacy. 2. Why 156 MB?

If you think it might be real, contact the supposed sender via a fresh email or phone call—never reply to the suspicious message. 4. What to do if you already clicked