"I'm a Mac user, but on my Mac I have multiple instances of Windows--XP, Vista, very old Windows stuff and the very latest stuff, like Windows Server 2008, " he says.

FORBES: Magazine Article

This sort of malware is commonplace, with examples existing for Windows XP, Windows Vista, Windows 7 and even Mac OS X.

FORBES: Hackers Ready 'Fake' Windows 8 Antivirus Tool

The iTunes vulnerabilities were spotted by Kaspersky on the Mac OSX v10.5 and later, Windows 7, Vista, and Windows XP SP2.

FORBES: Apple's iTunes, QuickTime, High On Cyber Security Vulnerability List, Kasperky Lab Says