All versions of Microsoft Windows, including the new Windows 10 operating system has been affected by a critical vulnerability. It is a memory corruption flaw or known as: (MS16-013). It could allow a remote attacker to execute arbitrary code as the logged-in user by tricking a user into opening a specially crafted Journal file.
If you want to read more on this situation please go here: http://thehackernews.com/2016/02/windows-security-update.html
It is highly suggested that you update your version of Windows as soon as possible!