This thread's last reply is from February 24, 2016, 10:13 PM UTC. Software, malware, and removal-tool
advice below may be out of date — treat specific steps and download links with caution.
Gary R
It only applies to Mint Cinnamon 17.3 (Rosa) versions, and was only up for 1 day 20th Feb 2016, so if you downloaded a copy of the ISO on that day, then you need to run a hash check on it to find out whether you've got a bad copy or not.
https://ftp.heanet.ie/pub/linuxmint.com/stable/17.3/md5sum.txt
https://ftp.heanet.ie/pub/linuxmint.com/stable/17.3/sha256sum.txt