In a new post on the Internet Explorer developer blog, Microsoft goes over some of the changes it has made to Internet Explorer 10 for Windows 8 in terms of improving JavaScript performance.

A new Windows zero-day allows threat actors to use malicious JavaScript files to bypass Mark-of-the-Web security warnings. Threat actors are already seen using the zero-day bug in ransomware attacks.

Microsoft officially retired JScript years ago, along with proper support for the original Internet Explorer browser. However, the JScript engine still lingers in modern Windows installations ...