The question is, are people still using QuickTime?
QuickTime is the primary media player on the Mac that can play its proprietary video format, MOV. Before, to be able to play these files on Windows machines, you would need to install QuickTime for Windows, which is usually bundled with the iTunes installation when you install it.
Since QuickTime for Windows was overshadowed by more popular software like VLC Media Player, the software never for the proper update unlike its Mac OS X counterpart.
With this, the United States Department of Homeland Security has issued an advisory telling users to quickly remove QuickTime for Windows since it has discovered a security vulnerability that could allow hackers to install malware and gain personal information.
To be on the safe side, you can quickly uninstall QuickTime for Windows by going to the Programs and Features tab on the Windows Control Panel.