If your Windows-based computer suddenly won't boot up, it could be the evil doing of malicious malware that deletes the contents of your computer -- farewell, documents, pictures, and videos -- and then prevents reboot.
Just spotted in the wild, it's being called either Disttrack (McAfee's name) or the Shamoon attacks (Symantec's), and researchers say it's notable because it's been a long while since they've noticed malware going to such lengths to truly make someone's life miserable in this way by deleting personal files.
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Shamoon Malware Threatens to Wipe Your Drive | PCWorld