Apple used to release versions of Windows for some of its native OS X applications, but lately, only iTunes and iCloud have received functionality updates. QuickTime Player for Windows has been completely abandoned and new vulnerabilities discovered by Trend Micro bring into question an imminent danger for all those who still have this software installed. The situation is so severe that the U.S. Government made an official announcement about this situation.
Trend Micro claims that these vulnerabilities are present in all versions of QuickTime so far, and the fact that Apple has stopped support for this platform exposes all its users to a high risk of attack. Although the security breaches were not detailed, it appears that potential attackers might gain access to all data on the target computer, with the ability to modify or delete it. The problem is compounded by the fact that many of the iPod, iPhone or iPad users have already installed QuickTime, whereas Apple still recommends installing iTunes.
It is quite possible that these vulnerabilities to never be discovered by hackers or may not be used, but as long as QuickTime remains installed on your system, you need a good system protection (antivirus, firewall, a router with advanced security options). The simplest solution is to uninstall the software. Although it was in the past the app was used to play videos in the .MOV format, they can now be played on most applications of video playback. Considering the outdated interface and limited compatibility with modern video file formats, QuickTime on Windows doesn’t have much utility in 2017 anyway.