"Regular security updates help protect computers from malicious attacks, so upgrading and staying current is important," Microsoft says on a web page about the change.
Internet Explorer 11 offers "improved security, increased performance, better backward compatibility" and support for modern web standards, it added.
The installer notifies you if Java content is disabled in web browsers, and provides instructions for enabling it.
This change shouldn't be a surprise: Microsoft first announced the cutoff was coming back in August 2014.
Still, the shift will have a major impact on Internet users: By some estimates that means hundreds of millions of users will need to upgrade or be left at greater digital risk.
When the Active X control blocks an older Java version, you'll see: It is recommended you update Java before allowing the app to run. If you don't trust the site or prompt, you can visit the web site to get the latest version.
The out-of-date Active X control blocking applies to: In some instances, after installing Java 7 using Internet Explorer, Java apps do not function.