Email (phishing): Warning: Spam emails delivering malware via PowerPoint files
Do not hover over document links in emails; be extra careful when opening any Microsoft Office document. PowerPoint files can run malicious code without triggering antivirus warning. A security feature in most versions of MS Office including Office 2013 and Office 2010, displays a warning about enabling or disabling content. If you neglect this warning the code will download and execute a malicious file. Delete emails with attachments from unknown senders.