There is a new, very serious Windows security issue that was discovered just a few days ago but is already being exploited.
You can get in trouble just by viewing an infected image. This could be an image on a website or sent within an email.
At minimum, be very careful about the websites you visit and turn off image viewing in email until Windows comes out with a patch.
If you want to protect yourself, there is a command you can run to turn off the feature in Windows that the bad guys are using for this. Doing this command will make it so your computer will no longer display thumbnails of your pictures when you are browsing your system. There is also code to turn this back after Windows has provided a patch and you have updated. I am going to run this command myself.
This information comes from a very trusted site. If you want to protect your machine, This Site will show you how to turn this off and later back on.