Aubrielle found this:
http://www.pcgamer.com/windows-users-should-uninstall-quicktime-immediately-trend-micro-warns/
Trend Micro is warning us to get rid of Quicktime if we've still got it. Apparently it's got critical vulnerabilities that hackers are exploiting, and those vulnerabilities aren't likely to be fixed since Apple has stopped updating it.
http://www.pcgamer.com/windows-users-should-uninstall-quicktime-immediately-trend-micro-warns/